Updating README.md.

Minor fixes to handle invalid metric record.

README.md

@@ -11,22 +11,35 @@ Don't forget to download & install [cassandra-cpp](https://downloads.datastax.co
 ## Run
 
 ```sh
-$ cargo build
-    Finished dev [unoptimized + debuginfo] target(s) in 0.04s
-
-$ cargo run -- --help
 bgutil-rs 
 
 USAGE:
-    bgutil-rs <SUBCOMMAND>
+    bgutil-rs [FLAGS] [OPTIONS] <SUBCOMMAND>
+
+FLAGS:
+        --dry-run    Do not write in database (local-clean only)
+    -h, --help       Prints help information
+    -V, --version    Prints version information
+
+OPTIONS:
+        --contact-metadata <contact-metadata>
+             [env: CASSANDRA_CONTACT_METADATA=localhost]
+
+        --contact-points <contact-points>
+             [env: CASSANDRA_CONTACT_POINTS=localhost]
+
 
 SUBCOMMANDS:
-    delete    Delete metric(s)
-    help      Prints this message or the help of the given subcommand(s)
-    info      Information about a metric
-    list      List metrics with given pattern
-    read      Read a metric contents
-    write     Write a metric and its value
+    clean          Clean outdated metrics & empty directories
+    delete         Delete metric(s)
+    help           Prints this message or the help of the given subcommand(s)
+    info           Information about a metric
+    list           List metrics with given pattern
+    local-clean    Clean a directory of outdated metrics & empty sub-directories
+    read           Read a metric contents
+    stats          Stats
+    write          Write a metric and its value
+
 ```
 
 ### Info
@@ -150,6 +163,46 @@ ARGS:
     <metric>
 ```
 
+### Clean
+
+```sh
+$ cargo run -- clean --help
+bgutil-rs-clean
+Stats
+
+USAGE:
+    bgutil-rs clean [FLAGS] [OPTIONS]
+
+FLAGS:
+        --clean-directories
+        --clean-metrics
+
+OPTIONS:
+        --end-key <end-key>
+        --start-key <start-key>
+```
+
+### Local-clean
+
+Clean outdated metrics in a given directory.
+
+```sh
+$ cargo run -- local-clean --help
+bgutil-rs-local-clean 
+Clean a directory of outdated metrics & empty sub-directories
+
+USAGE:
+    bgutil-rs local-clean <directory>
+
+FLAGS:
+    -h, --help       Prints help information
+    -V, --version    Prints version information
+
+ARGS:
+    <directory>
+```
+
+
 ## Todo
 
 * command: read
@@ -160,3 +213,11 @@ ARGS:
   - Arguments handling
 * command: delete
   - with recursive
+* command: clean
+  - progress bar
+* ...
+
+
+## Dedication
+
+This piece of software was written during the mourning of Jean-Yves Moyart, aka Maître Mô, 21/10/1967-20/02/2021. My thoughts were with him, his family, his friends and all of us, who really appreciated him. Rest in Peace.

src/cassandra.rs

@@ -3,9 +3,9 @@
  *
  * Author: Patrick MARIE <pm@mkz.me>
  */
-
 use std::str::FromStr;
-use std::convert::TryFrom;
+use std::fmt;
+use std::error;
 
 use crate::metric::Metric;
 use crate::session::Session;
@@ -14,31 +14,165 @@ use crate::timerange::TimeRange;
 
 use cassandra_cpp::Session as CassSession;
 use cassandra_cpp::Uuid as CassUuid;
-use cassandra_cpp::{Batch,BatchType,BindRustType,CassCollection,Cluster,Error,LogLevel,Map};
+use cassandra_cpp::{Batch,BatchType,BindRustType,CassCollection,Cluster,Error,LogLevel,Map,RetryPolicy,Statement};
 use cassandra_cpp::{set_level,stmt};
 
+use chrono::Duration;
 use uuid::Uuid;
 
+#[derive(Debug, Clone)]
+struct NoRecord;
+
+impl fmt::Display for NoRecord {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "no record suitable")
+    }
+}
+
+impl error::Error for NoRecord {}
+
 pub fn connect(contact_points: &str) -> Result<CassSession, Error> {
     set_level(LogLevel::DISABLED);
 
     let mut cluster = Cluster::default();
     cluster.set_contact_points(contact_points).unwrap();
     cluster.set_load_balance_round_robin();
-
+    cluster.set_retry_policy(RetryPolicy::downgrading_consistency_new());
+    cluster.set_request_timeout(Duration::seconds(30));
     cluster.set_protocol_version(4)?;
 
     cluster.connect()
 }
 
-pub fn fetch_metric(session: &Session, metric_name: &str) -> Result<Metric, Error> {
+pub fn prepare_component_query(table_name: &str, arguments: &Vec<&str>) -> Result<Statement, Error> {
+    let mut q = format!("SELECT parent, name FROM biggraphite_metadata.{} WHERE ", table_name);
+    let mut component_number = 0;
+    let mut components = vec![];
+
+    for (id, component) in arguments.iter().enumerate() {
+        let mut operator = "=";
+
+        if *component == "*" {
+            component_number += 1;
+            continue;
+        }
+
+        if component_number != 0 {
+            q.push_str("AND ");
+        }
+
+        if component.ends_with("*") {
+            operator = "LIKE";
+        }
+
+        q.push_str(format!("component_{} {} ? ", id, operator).as_str());
+        component_number += 1;
+        components.push(component.replace("*", "%"));
+    }
+
+    if component_number != 0 {
+        q.push_str("AND ");
+    }
+
+    // Adding last component for __END__.
+    q.push_str(format!("component_{} = ? ALLOW FILTERING;", component_number).as_str());
+    components.push("__END__".to_string());
+
+    let mut query = stmt!(q.as_str());
+
+    for (id, arg) in components.iter().enumerate() {
+        query.bind(id, arg.as_str())?;
+    }
+
+    Ok(query)
+}
+
+pub fn prepare_component_query_globstar(table_name: &str, arguments: &Vec<&str>) -> Result<Vec<Statement>, Error> {
+    let _q = format!("SELECT parent, name FROM biggraphite_metadata.{} WHERE ", table_name);
+    let _component_number = 0;
+
+    let mut out = vec![];
+
+    let pos_globstar = arguments.iter().enumerate().filter(|(_, &x)| x == "**").map(|(id, _)| id).collect::<Vec<usize>>();
+    if pos_globstar.len() != 1 {
+        // XXX return error
+        return Ok(vec![prepare_component_query(table_name, arguments)?]);
+    }
+
+    let pos_globstar = pos_globstar[0];
+    let mut queries = vec![];
+
+    let mut init_args = vec![];
+    let mut end_args = arguments[pos_globstar+1..].to_vec();
+    end_args.push("__END__");
+
+    for (id, el) in arguments[0..pos_globstar].iter().enumerate() {
+        if *el == "*" {
+            continue;
+        }
+
+        if el.ends_with("*") {
+            init_args.push((id, "LIKE", el.replace("*", "%")));
+        } else {
+            init_args.push((id, "=", el.to_string()));
+        }
+    }
+
+    let components = 16;
+
+    for id in init_args.len()..(components-end_args.len()+1) {
+        let mut current_query = init_args.to_vec();
+
+        for (sub_id, el) in end_args.iter().enumerate() {
+            if *el == "*" {
+                continue;
+            }
+
+            if el.ends_with("*") {
+                current_query.push((sub_id + id, "LIKE", el.replace("*", "%")));
+            } else {
+                current_query.push((sub_id + id, "=", el.to_string()));
+            }
+        }
+
+        queries.push(current_query);
+    }
+
+    for query in &queries {
+        let mut current_query = _q.to_string();
+
+        for el in query {
+            if el.0 != 0 {
+                current_query.push_str("AND ");
+            }
+
+            current_query.push_str(&format!("component_{} {} ? ", el.0, el.1));
+        }
+
+        current_query.push_str(&String::from("ALLOW FILTERING;"));
+
+        let mut statement = stmt!(&current_query);
+        for (id, el) in query.iter().enumerate() {
+            statement.bind(id, el.2.as_str())?;
+        }
+
+        out.push(statement);
+    }
+
+    Ok(out)
+}
+
+pub fn fetch_metric(session: &Session, metric_name: &str) -> Result<Metric, Box<dyn error::Error>> {
     let mut query = stmt!("SELECT * FROM biggraphite_metadata.metrics_metadata WHERE name = ?");
+    query.set_consistency(session.read_consistency())?;
     query.bind(0, metric_name)?;
 
-    // XXX set consistency
-    // query.set_consistency(session.read_consistency());
+    let result = session.metadata_session().execute(&query).wait()?;
+
+    if result.row_count() == 0 {
+        return Err(NoRecord.into());
+    }
 
-    let result =  session.metadata_session().execute(&query).wait()?;
     Ok(result.first_row().unwrap().into())
 }
 
@@ -195,62 +329,33 @@ pub fn create_metric(session: &Session, metric: &str) -> Result<(), Error> {
     Ok(())
 }
 
-pub fn metric_delete(session: &Session, metric_name: &str) -> Result<(), Error> {
-    let mut query = stmt!("SELECT * FROM biggraphite_metadata.metrics_metadata WHERE name = ?");
-    query.bind(0, metric_name)?;
+pub fn delete_metric(session: &Session, name: &str) -> Result<(), Error> {
+    let namespace = "biggraphite_metadata";
+    let delete_metric_query = format!("DELETE FROM {}.metrics WHERE name = ?;", namespace);
+    let delete_metadata_query = format!("DELETE FROM {}.metrics_metadata WHERE name = ?;", namespace);
 
-    let result = session.metadata_session().execute(&query).wait()?;
-    if result.row_count() == 0 {
-        println!("Metric is not existing");
-        return Ok(());
-    }
+    let mut delete_metric_query = stmt!(delete_metric_query.as_str());
+    delete_metric_query.set_consistency(session.write_consistency())?;
+    delete_metric_query.bind(0, name)?;
+    session.metadata_session().execute(&delete_metric_query).wait()?;
 
-    let _metric = fetch_metric(session, metric_name)?;
-
-    let mut query = stmt!("DELETE FROM biggraphite_metadata.metrics_metadata WHERE name = ?;");
-    query.bind(0, metric_name)?;
-    query.set_consistency(session.write_consistency())?;
-    session.metadata_session().execute(&query).wait()?;
-
-    let mut query = stmt!("DELETE FROM biggraphite_metadata.metrics_metadata WHERE name = ?;");
-    query.bind(0, metric_name)?;
-    query.set_consistency(session.write_consistency())?;
-    session.metadata_session().execute(&query).wait()?;
-
-    let mut query = stmt!("DELETE FROM biggraphite_metadata.directories WHERE name = ?;");
-    query.bind(0, metric_name)?;
-    query.set_consistency(session.write_consistency())?;
-    session.metadata_session().execute(&query).wait()?;
+    let mut delete_metadata_query = stmt!(delete_metadata_query.as_str());
+    delete_metric_query.set_consistency(session.write_consistency())?;
+    delete_metadata_query.bind(0, name)?;
+    session.metadata_session().execute(&delete_metric_query).wait()?;
 
     Ok(())
 }
 
-pub fn metric_write(session: &Session, metric_name: &str, value: f64, retention: &str, timestamp: i64) -> Result<(), Error> {
-    let mut query = stmt!("SELECT * FROM biggraphite_metadata.metrics_metadata WHERE name = ?");
-    query.bind(0, metric_name)?;
 
-    let result = session.metadata_session().execute(&query).wait()?;
-    if result.row_count() == 0 {
-        create_metric(session, metric_name)?;
-    }
+pub fn delete_directory(session: &Session, name: &str) -> Result<(), Error> {
+    let namespace = "biggraphite_metadata";
+    let delete_directory_query = format!("DELETE FROM {}.directories WHERE name = ?;", namespace);
 
-    let stage = Stage::try_from(retention)?;
-
-    let metric = fetch_metric(session, metric_name)?;
-    let (time_start_ms, offset) = stage.time_offset_ms(timestamp);
-
-    let query = format!(
-        "INSERT INTO biggraphite.{} (metric, time_start_ms, offset, value) VALUES (?, ?, ?, ?);",
-        stage.table_name()
-    );
-
-    let mut query = stmt!(&query);
-    query.bind(0, CassUuid::from_str(metric.id().as_str())?)?;
-    query.bind(1, time_start_ms)?;
-    query.bind(2, offset as i16)?;
-    query.bind(3, value)?;
-
-    session.points_session().execute(&query).wait()?;
+    let mut delete_directory_query = stmt!(delete_directory_query.as_str());
+    delete_directory_query.set_consistency(session.write_consistency())?;
+    delete_directory_query.bind(0, name)?;
+    session.metadata_session().execute(&delete_directory_query).wait()?;
 
     Ok(())
-}
+}

src/cmd.rs

@@ -0,0 +1,12 @@
+/*
+ * bgutil-rs
+ *
+ * Author: Patrick MARIE <pm@mkz.me>
+ */
+pub mod clean;
+pub mod delete;
+pub mod info;
+pub mod list;
+pub mod local_clean;
+pub mod stats;
+pub mod write;

src/cmd/clean.rs

@@ -0,0 +1,148 @@
+/*
+ * bgutil-rs
+ *
+ * Author: Patrick MARIE <pm@mkz.me>
+ */
+use crate::Session;
+
+use cassandra_cpp::{BindRustType,Error};
+use cassandra_cpp::stmt;
+
+use chrono::Utc;
+
+pub fn metrics_clean(session: &Session, start_key: i64, end_key: i64, clean_metrics: bool, clean_directories: bool) -> Result<(), Error> {
+    let mut current_token = start_key;
+    let cutoff : u64 = (Utc::now().timestamp() as u64 - 86400 * 14) * 1000;
+
+    let namespace = "biggraphite_metadata";
+    let batch_limit = 1000;
+
+    let query = format!("SELECT name, token(name) FROM {}.metrics_metadata \
+                         WHERE updated_on <= maxTimeuuid({}) and token(name) > ? and token(name) < ? LIMIT {};",
+                        namespace, cutoff, batch_limit);
+    let delete_metric_query = format!("DELETE FROM {}.metrics WHERE name = ?;", namespace);
+    let delete_metadata_query = format!("DELETE FROM {}.metrics_metadata WHERE name = ?;", namespace);
+
+    let mut deleted_metrics_count = 0;
+    let mut scanned_metrics_count = 0;
+    let mut scanned_directories_count = 0;
+    let mut deleted_directories_count = 0;
+
+    // clean metrics
+    loop {
+        if !clean_metrics || current_token >= end_key {
+            // println!("Stopping: {} >= {}", current_token, end_key);
+            break;
+        }
+
+        let mut outdated_metrics_query = stmt!(query.as_str());
+        outdated_metrics_query.set_consistency(session.read_consistency())?;
+        outdated_metrics_query.bind(0, current_token)?;
+        outdated_metrics_query.bind(1, end_key)?;
+
+        let result = session.metadata_session().execute(&outdated_metrics_query).wait()?;
+        if result.row_count() == 0 {
+            break;
+        }
+        let mut queries = vec![];
+
+        for row in result.iter() {
+            let name = row.get_column_by_name("name".to_string())?.to_string();
+            scanned_metrics_count += 1;
+            let mut delete_metric_query = stmt!(delete_metric_query.as_str());
+            delete_metric_query.set_consistency(session.write_consistency())?;
+            delete_metric_query.bind(0, name.as_str())?;
+            queries.push(session.metadata_session().execute(&delete_metric_query));
+
+            let mut delete_metadata_query = stmt!(delete_metadata_query.as_str());
+            delete_metric_query.set_consistency(session.write_consistency())?;
+            delete_metadata_query.bind(0, name.as_str())?;
+            queries.push(session.metadata_session().execute(&delete_metadata_query));
+
+            deleted_metrics_count += 1;
+            current_token = row.get_column(1)?.get_i64()?;
+        }
+
+        if result.row_count() != batch_limit {
+            // println!("Stopping because count == 0");
+            break;
+        }
+
+        for query in queries {
+            if let Err(err) = query.wait() {
+                eprintln!("Failed: {:?}", err);
+            }
+        }
+    }
+
+    let list_directories_query = format!("SELECT name, token(name) FROM {}.directories WHERE token(name) > ? AND token(name) < ? LIMIT {};",
+        namespace, batch_limit);
+    let metric_query = format!("SELECT name FROM {}.metrics WHERE parent LIKE ? LIMIT 1", namespace);
+    let delete_directory_query = format!("DELETE FROM {}.directories WHERE name = ?;", namespace);
+
+    current_token = start_key;
+
+    // clean directories
+    loop {
+        if !clean_directories || current_token >= end_key {
+            break;
+        }
+
+        let mut list_directories_query = stmt!(list_directories_query.as_str());
+        list_directories_query.set_consistency(session.read_consistency())?;
+        list_directories_query.bind(0, current_token)?;
+        list_directories_query.bind(1, end_key)?;
+
+        let list_result = session.metadata_session().execute(&list_directories_query).wait()?;
+        if list_result.row_count() == 0 {
+            break;
+        }
+
+        let mut queries = vec![];
+
+        for row in list_result.iter() {
+            let mut name = row.get_column_by_name("name".to_string())?.to_string();
+            let orig_name = name.clone();
+            name.push_str(".%");
+            current_token = row.get_column(1)?.get_i64()?;
+
+            let mut metric_query = stmt!(metric_query.as_str());
+            metric_query.set_consistency(session.read_consistency())?;
+            metric_query.bind(0, name.as_str())?;
+            let query = session.metadata_session().execute(&metric_query);
+
+            queries.push((orig_name, query));
+        }
+
+        let mut to_delete_queries = vec![];
+
+        for el in queries {
+            let result = el.1.wait()?;
+            scanned_directories_count += 1;
+            if result.row_count() != 0 {
+                continue;
+            }
+
+            let mut delete_directory_query = stmt!(delete_directory_query.as_str());
+            delete_directory_query.set_consistency(session.write_consistency())?;
+            delete_directory_query.bind(0, el.0.as_str())?;
+
+            to_delete_queries.push(session.metadata_session().execute(&delete_directory_query));
+
+            deleted_directories_count += 1;
+        }
+
+        for to_delete in to_delete_queries {
+            to_delete.wait()?;
+        }
+
+        if list_result.row_count() != batch_limit {
+            break;
+        }
+    }
+
+    println!("Deleted {} metrics, {} directories.", deleted_metrics_count, deleted_directories_count);
+    println!("Scanned {} metrics, {} directories", scanned_metrics_count, scanned_directories_count);
+
+    Ok(())
+}

src/cmd/delete.rs

@@ -0,0 +1,42 @@
+/*
+ * bgutil-rs
+ *
+ * Author: Patrick MARIE <pm@mkz.me>
+ */
+use std::error;
+
+use cassandra_cpp::stmt;
+use cassandra_cpp::BindRustType;
+use crate::fetch_metric;
+
+use crate::Session;
+
+pub fn metric_delete(session: &Session, metric_name: &str) -> Result<(), Box<dyn error::Error>> {
+    let mut query = stmt!("SELECT * FROM biggraphite_metadata.metrics_metadata WHERE name = ?");
+    query.bind(0, metric_name)?;
+
+    let result = session.metadata_session().execute(&query).wait()?;
+    if result.row_count() == 0 {
+        println!("Metric is not existing");
+        return Ok(());
+    }
+
+    let _metric = fetch_metric(session, metric_name)?;
+
+    let mut query = stmt!("DELETE FROM biggraphite_metadata.metrics_metadata WHERE name = ?;");
+    query.bind(0, metric_name)?;
+    query.set_consistency(session.write_consistency())?;
+    session.metadata_session().execute(&query).wait()?;
+
+    let mut query = stmt!("DELETE FROM biggraphite_metadata.metrics_metadata WHERE name = ?;");
+    query.bind(0, metric_name)?;
+    query.set_consistency(session.write_consistency())?;
+    session.metadata_session().execute(&query).wait()?;
+
+    let mut query = stmt!("DELETE FROM biggraphite_metadata.directories WHERE name = ?;");
+    query.bind(0, metric_name)?;
+    query.set_consistency(session.write_consistency())?;
+    session.metadata_session().execute(&query).wait()?;
+
+    Ok(())
+}

src/cmd/info.rs

@@ -0,0 +1,17 @@
+/*
+ * bgutil-rs
+ *
+ * Author: Patrick MARIE <pm@mkz.me>
+ */
+use std::error;
+
+use crate::Session;
+use crate::fetch_metric;
+
+pub fn metric_info(session: &Session, metric_name: &str) -> Result<(), Box<dyn error::Error>> {
+    let metric = fetch_metric(session, metric_name)?;
+
+    println!("{}", metric);
+
+    Ok(())
+}

src/cmd/list.rs

@@ -0,0 +1,62 @@
+/*
+ * bgutil-rs
+ *
+ * Author: Patrick MARIE <pm@mkz.me>
+ */
+
+use crate::prepare_component_query_globstar;
+use crate::fetch_metrics;
+use crate::Session;
+use cassandra_cpp::{Error};
+
+pub fn metric_list(session: &Session, glob: &str) -> Result<(), Error> {
+    let components = glob.split(".").collect::<Vec<&str>>();
+
+    let query_directories = prepare_component_query_globstar("directories", &components)?;
+    let mut results = vec![];
+
+    for mut q in query_directories {
+        q.set_consistency(session.read_consistency())?;
+        results.push(session.metadata_session().execute(&q));
+    }
+
+    for result in results {
+        let rows = result.wait()?;
+        for row in rows.iter() {
+            let name = row.get_column_by_name("name".to_string()).unwrap().to_string();
+            println!("d {}", name);
+
+        }
+    }
+
+    let query_metrics = prepare_component_query_globstar("metrics", &components)?;
+    let mut results = vec![];
+
+    for mut q in query_metrics {
+        q.set_consistency(session.read_consistency())?;
+        results.push(session.metadata_session().execute(&q));
+    }
+
+    for result in results {
+        let res = result.wait();
+        if let Err(err) = res {
+            eprintln!("Query failed: {}", err);
+            continue;
+        }
+
+        let rows = res.unwrap();
+        let names = rows
+            .iter()
+            .map(|x| {
+                x.get_column_by_name("name".to_string()).unwrap().to_string()
+            })
+            .collect::<Vec<String>>();
+
+        let metrics = fetch_metrics(session, &names)?;
+        for metric in metrics {
+            println!("m {}", metric);
+        }
+    }
+
+    Ok(())
+}

src/cmd/local_clean.rs

@@ -0,0 +1,135 @@
+/*
+ * bgutil-rs
+ *
+ * Author: Patrick MARIE <pm@mkz.me>
+ */
+use std::error;
+
+use crate::Session;
+
+use crate::delete_directory;
+use crate::delete_metric;
+use crate::fetch_metric;
+use crate::prepare_component_query_globstar;
+
+use cassandra_cpp::stmt;
+use cassandra_cpp::BindRustType;
+
+use chrono::Utc;
+
+fn clean_metrics_in_directory(session: &Session, directory: &str) -> Result<(), Box<dyn error::Error>> {
+    // println!("Cleaning metrics in directory: '{}'", directory);
+
+    let mut directory = String::from(directory);
+    directory.push_str(".**");
+
+    let components = directory.split(".").collect::<Vec<&str>>();
+    let mut results = vec![];
+
+    let query_metrics = prepare_component_query_globstar("metrics", &components)?;
+    let outdated_ts : u64 = (Utc::now().timestamp() as u64 - 14 * 86400) * 1000;
+
+    for mut q in query_metrics {
+        q.set_consistency(session.read_consistency())?;
+        results.push(session.metadata_session().execute(&q));
+    }
+
+    for result in results {
+        let rows = result.wait()?;
+        for row in rows.iter() {
+            let name = row.get_column_by_name("name".to_string()).unwrap().to_string();
+            let metric = fetch_metric(session, &name);
+
+            if let Err(e) = metric {
+                eprintln!("Error while retrieving metric: {}", e);
+                continue;
+            }
+
+            let metric = metric.unwrap();
+
+            if metric.updated_on() > outdated_ts {
+                continue;
+            }
+
+            println!("Deleting metric {}", metric.name());
+            if session.is_dry_run() {
+                continue;
+            }
+            delete_metric(session, metric.name())?;
+        }
+    }
+
+    Ok(())
+}
+
+fn directory_has_metrics(session: &Session, directory: &str) -> Result<bool, Box<dyn error::Error>> {
+    let query = format!("SELECT name FROM biggraphite_metadata.metrics WHERE parent LIKE ? LIMIT 1;");
+    let mut query = stmt!(query.as_str());
+    let mut directory = String::from(directory);
+    directory.push_str(".%");
+    query.bind(0, directory.as_str())?;
+
+    let result = session.metadata_session().execute(&query).wait()?;
+
+    Ok(result.row_count() != 0)
+}
+
+fn clean_empty_directories_in_directory(session: &Session, directory: &str) -> Result<(), Box<dyn error::Error>> {
+    // println!("Cleaning empty directories in directory '{}'", directory);
+
+    let mut directory = String::from(directory);
+    directory.push_str(".**");
+
+    let components = directory.split(".").collect::<Vec<&str>>();
+    let mut results = vec![];
+
+    let query_directories = prepare_component_query_globstar("directories", &components)?;
+
+    for mut q in query_directories {
+        q.set_consistency(session.read_consistency())?;
+        results.push(session.metadata_session().execute(&q));
+    }
+
+    for result in results {
+        let rows = result.wait()?;
+        for row in rows.iter() {
+            let name = row.get_column_by_name("name".to_string()).unwrap().to_string();
+
+            if directory_has_metrics(session, &name)? {
+                continue;
+            }
+
+            println!("Deleting directory {}", name);
+            if session.is_dry_run() {
+                continue;
+            }
+            delete_directory(session, &name)?;
+        }
+    }
+
+    Ok(())
+}
+
+pub fn metrics_local_clean(session: &Session, directory: &str) -> Result<(), Box<dyn error::Error>> {
+    let components = directory.split(".").collect::<Vec<&str>>();
+
+    let query_directories = prepare_component_query_globstar("directories", &components)?;
+    let mut results = vec![];
+
+    for mut q in query_directories {
+        q.set_consistency(session.read_consistency())?;
+        results.push(session.metadata_session().execute(&q));
+    }
+
+    for result in results {
+        let rows = result.wait()?;
+        for row in rows.iter() {
+            let name = row.get_column_by_name("name".to_string()).unwrap().to_string();
+
+            clean_metrics_in_directory(session, &name)?;
+            clean_empty_directories_in_directory(session, &name)?;
+        }
+    }
+
+    Ok(())
+}

src/cmd/stats.rs

@@ -0,0 +1,70 @@
+/*
+ * bgutil-rs
+ *
+ * Author: Patrick MARIE <pm@mkz.me>
+ */
+use cassandra_cpp::{BindRustType,Error};
+use cassandra_cpp::stmt;
+
+use std::collections::HashMap;
+
+use crate::Metric;
+use crate::Session;
+
+pub fn metric_stats(session: &Session, start_key: i64, end_key: i64) -> Result<(), Error> {
+    let q =
+        "SELECT id, name, token(name), config, created_on, updated_on, read_on \
+         FROM biggraphite_metadata.metrics_metadata WHERE token(name) > ? LIMIT 1000";
+
+    let mut current_token = start_key;
+    let mut n = 0;
+    let mut points : u64 = 0;
+
+    let mut stats : HashMap<String, usize> = HashMap::new();
+
+    while current_token < end_key {
+        let mut query = stmt!(q);
+        query.bind(0, current_token)?;
+
+        let results = session.metadata_session().execute(&query).wait()?;
+
+        for row in results.iter() {
+            current_token = row.get_column(2)?.get_i64()?;
+
+            let metric : Metric = row.into();
+            let stages = match metric.stages() {
+                Ok(stages) => stages,
+                Err(_) => continue,
+            };
+
+            for stage in stages {
+                points += stage.points() as u64;
+            }
+
+            let parts = metric.name().split(".").collect::<Vec<&str>>();
+            *stats.entry(String::from(parts[0])).or_insert(0) += 1;
+
+            n += 1;
+        }
+    }
+
+    let p : f64 = ((current_token - start_key) / std::i64::MAX) as f64;
+
+    println!("Range: {} -> {} ({:.4}%)", start_key, current_token, 100. * p);
+    println!("{} metrics", n);
+    println!("{} points", points);
+    println!("-----");
+
+    let mut vec : Vec<(&String, &usize)> = stats.iter().collect();
+    vec.sort_by(|a, b| b.1.cmp(a.1));
+
+    for (id, v) in vec.iter().enumerate() {
+        println!("{} {}", v.0, v.1);
+
+        if id == 10 {
+            break;
+        }
+    }
+
+    Ok(())
+}

src/cmd/write.rs

@@ -0,0 +1,49 @@
+/*
+ * bgutil-rs
+ *
+ * Author: Patrick MARIE <pm@mkz.me>
+ */
+use std::error;
+use std::str::FromStr;
+
+use crate::Session;
+use crate::Stage;
+
+use crate::create_metric;
+use crate::fetch_metric;
+
+use cassandra_cpp::stmt;
+use cassandra_cpp::BindRustType;
+use cassandra_cpp::Uuid as CassUuid;
+
+use std::convert::TryFrom;
+
+pub fn metric_write(session: &Session, metric_name: &str, value: f64, retention: &str, timestamp: i64) -> Result<(), Box<dyn error::Error>> {
+    let mut query = stmt!("SELECT * FROM biggraphite_metadata.metrics_metadata WHERE name = ?");
+    query.bind(0, metric_name)?;
+
+    let result = session.metadata_session().execute(&query).wait()?;
+    if result.row_count() == 0 {
+        create_metric(session, metric_name)?;
+    }
+
+    let stage = Stage::try_from(retention)?;
+
+    let metric = fetch_metric(session, metric_name)?;
+    let (time_start_ms, offset) = stage.time_offset_ms(timestamp);
+
+    let query = format!(
+        "INSERT INTO biggraphite.{} (metric, time_start_ms, offset, value) VALUES (?, ?, ?, ?);",
+        stage.table_name()
+    );
+
+    let mut query = stmt!(&query);
+    query.bind(0, CassUuid::from_str(metric.id().as_str())?)?;
+    query.bind(1, time_start_ms)?;
+    query.bind(2, offset as i16)?;
+    query.bind(3, value)?;
+
+    session.points_session().execute(&query).wait()?;
+
+    Ok(())
+}

src/main.rs

@@ -3,13 +3,10 @@
  *
  * Author: Patrick MARIE <pm@mkz.me>
  */
-
-use std::collections::HashMap;
 use std::convert::TryFrom;
 use std::error;
 
-use cassandra_cpp::{BindRustType,CassResult,Error,Statement};
-use cassandra_cpp::{stmt};
+use cassandra_cpp::CassResult;
 use chrono::Utc;
 use clap::{App,AppSettings,Arg,SubCommand};
 
@@ -18,12 +15,20 @@ mod metric;
 mod session;
 mod stage;
 mod timerange;
+mod cmd;
 
 use crate::cassandra::*;
 use crate::session::Session;
-use crate::stage::*;
+use crate::stage::Stage;
 use crate::metric::Metric;
 
+use crate::cmd::clean::*;
+use crate::cmd::delete::*;
+use crate::cmd::info::*;
+use crate::cmd::list::*;
+use crate::cmd::local_clean::*;
+use crate::cmd::stats::*;
+use crate::cmd::write::*;
 
 #[allow(dead_code)]
 fn describe_result(result: &CassResult) {
@@ -38,181 +43,20 @@ fn describe_result(result: &CassResult) {
     }
 }
 
-pub fn metric_info(session: &Session, metric_name: &str) -> Result<(), Error> {
-    let metric = fetch_metric(session, metric_name)?;
-
-    println!("{}", metric);
-
-    Ok(())
-}
-
-fn prepare_component_query(table_name: &str, arguments: &Vec<&str>) -> Result<Statement, Error> {
-    let mut q = format!("SELECT parent, name FROM biggraphite_metadata.{} WHERE ", table_name);
-    let mut component_number = 0;
-    let mut components = vec![];
-
-    for (id, component) in arguments.iter().enumerate() {
-        let mut operator = "=";
-
-        if *component == "*" {
-            component_number += 1;
-            continue;
-        }
-
-        if component_number != 0 {
-            q.push_str("AND ");
-        }
-
-        if component.ends_with("*") {
-            operator = "LIKE";
-        }
-
-        q.push_str(format!("component_{} {} ? ", id, operator).as_str());
-        component_number += 1;
-        components.push(component.replace("*", "%"));
-    }
-
-    if component_number != 0 {
-        q.push_str("AND ");
-    }
-
-    // Adding last component for __END__.
-    q.push_str(format!("component_{} = ? ALLOW FILTERING;", component_number).as_str());
-    components.push("__END__".to_string());
-
-    let mut query = stmt!(q.as_str());
-
-    for (id, arg) in components.iter().enumerate() {
-        query.bind(id, arg.as_str())?;
-    }
-
-    Ok(query)
-}
-
-fn prepare_component_query_globstar(table_name: &str, arguments: &Vec<&str>) -> Result<Vec<Statement>, Error> {
-    let _q = format!("SELECT parent, name FROM biggraphite_metadata.{} WHERE ", table_name);
-    let _component_number = 0;
-
-    let mut out = vec![];
-
-    let pos_globstar = arguments.iter().enumerate().filter(|(_, &x)| x == "**").map(|(id, _)| id).collect::<Vec<usize>>();
-    if pos_globstar.len() != 1 {
-        // XXX return error
-        return Ok(vec![prepare_component_query(table_name, arguments)?]);
-    }
-
-    let pos_globstar = pos_globstar[0];
-    let mut queries = vec![];
-
-    let mut init_args = vec![];
-    let mut end_args = arguments[pos_globstar+1..].to_vec();
-    end_args.push("__END__");
-
-    for (id, el) in arguments[0..pos_globstar].iter().enumerate() {
-        if *el == "*" {
-            continue;
-        }
-
-        if el.ends_with("*") {
-            init_args.push((id, "LIKE", el.replace("*", "%")));
-        } else {
-            init_args.push((id, "=", el.to_string()));
-        }
-    }
-
-    let components = 16;
-
-    for id in init_args.len()..(components-end_args.len()+1) {
-        let mut current_query = init_args.to_vec();
-
-        for (sub_id, el) in end_args.iter().enumerate() {
-            if *el == "*" {
-                continue;
-            }
-
-            if el.ends_with("*") {
-                current_query.push((sub_id + id, "LIKE", el.replace("*", "%")));
-            } else {
-                current_query.push((sub_id + id, "=", el.to_string()));
-            }
-        }
-
-        queries.push(current_query);
-    }
-
-    for query in &queries {
-        let mut current_query = _q.to_string();
-
-        for el in query {
-            if el.0 != 0 {
-                current_query.push_str("AND ");
-            }
-
-            current_query.push_str(&format!("component_{} {} ? ", el.0, el.1));
-        }
-
-        current_query.push_str(&String::from("ALLOW FILTERING;"));
-
-        let mut statement = stmt!(&current_query);
-        for (id, el) in query.iter().enumerate() {
-            statement.bind(id, el.2.as_str())?;
-        }
-
-        out.push(statement);
-    }
-
-    Ok(out)
-}
-
-fn metric_list(session: &Session, glob: &str) -> Result<(), Error> {
-    let components = glob.split(".").collect::<Vec<&str>>();
-
-    let query_directories = prepare_component_query_globstar("directories", &components)?;
-    let mut results = vec![];
-
-    for mut q in query_directories {
-        q.set_consistency(session.read_consistency())?;
-        results.push(session.metadata_session().execute(&q));
-    }
-
-    for result in results {
-        let rows = result.wait()?;
-        for row in rows.iter() {
-            let name = row.get_column_by_name("name".to_string()).unwrap().to_string();
-            println!("d {}", name);
-
-        }
-    }
-
-    let query_metrics = prepare_component_query_globstar("metrics", &components)?;
-    let mut results = vec![];
-
-    for mut q in query_metrics {
-        q.set_consistency(session.read_consistency())?;
-        results.push(session.metadata_session().execute(&q));
-    }
-
-    for result in results {
-        let rows = result.wait()?;
-        let names = rows
-            .iter()
-            .map(|x| {
-                x.get_column_by_name("name".to_string()).unwrap().to_string()
-            })
-            .collect::<Vec<String>>();
-
-        let metrics = fetch_metrics(session, &names)?;
-        for metric in metrics {
-            println!("m {}", metric);
-        }
-    }
-
-    Ok(())
-}
-
 fn main() -> Result<(), Box<dyn error::Error>> {
     let matches = App::new("bgutil-rs")
                            .setting(AppSettings::SubcommandRequired)
+                           .arg(Arg::with_name("contact-metadata")
+                                .long("contact-metadata")
+                                .env("CASSANDRA_CONTACT_METADATA")
+                                .takes_value(true))
+                           .arg(Arg::with_name("contact-points")
+                                .long("contact-points")
+                                .env("CASSANDRA_CONTACT_POINTS")
+                                .takes_value(true))
+                           .arg(Arg::with_name("dry-run")
+                                .help("Do not write in database (local-clean only)")
+                                .long("dry-run"))
                            .subcommand(SubCommand::with_name("info")
                                        .about("Information about a metric")
                                        .arg(Arg::with_name("metric")
@@ -269,12 +113,39 @@ fn main() -> Result<(), Box<dyn error::Error>> {
                                         .arg(Arg::with_name("end-key")
                                              .long("end-key")
                                              .takes_value(true)))
+                           .subcommand(SubCommand::with_name("clean")
+                                        .about("Clean outdated metrics & empty directories")
+                                        .arg(Arg::with_name("start-key")
+                                             .long("start-key")
+                                             .takes_value(true))
+                                        .arg(Arg::with_name("end-key")
+                                             .long("end-key")
+                                             .takes_value(true))
+                                        .arg(Arg::with_name("clean-metrics")
+                                             .long("clean-metrics"))
+                                        .arg(Arg::with_name("clean-directories")
+                                             .long("clean-directories")))
+                           .subcommand(SubCommand::with_name("local-clean")
+                                        .about("Clean a directory of outdated metrics & empty sub-directories")
+                                        .arg(Arg::with_name("directory")
+                                             .index(1)
+                                             .required(true)))
                            .get_matches();
 
-    let contact_points_metadata = "tag--cstars07--cassandra-cstars07.query.consul.preprod.crto.in";
-    let contact_points_data = "tag--cstars04--cassandra-cstars04.query.consul.preprod.crto.in";
+    let mut contact_points_metadata = "localhost";
+    if matches.is_present("contact-metadata") {
+        contact_points_metadata = matches.value_of("contact-metadata").unwrap();
+    }
 
-    let session = Session::new(&contact_points_metadata, &contact_points_data)?;
+    let mut contact_points_data = "localhost";
+    if matches.is_present("contact-points") {
+        contact_points_data = matches.value_of("contact-points").unwrap();
+    }
+
+    let dry_run = matches.is_present("dry-run");
+
+    let mut session = Session::new(&contact_points_metadata, &contact_points_data)?;
+    session.set_dry_run(dry_run);
 
     match matches.subcommand_name() {
         Some("info") => {
@@ -359,8 +230,8 @@ fn main() -> Result<(), Box<dyn error::Error>> {
         },
         Some("stats") => {
             let matches = matches.subcommand_matches("stats").unwrap();
-            let start_key = matches.value_of("start-key"); // 0
-            let end_key = matches.value_of("end-key"); // 100000000000000
+            let start_key = matches.value_of("start-key");
+            let end_key = matches.value_of("end-key");
 
             let start_key = match start_key {
                 None => 0,
@@ -386,6 +257,45 @@ fn main() -> Result<(), Box<dyn error::Error>> {
 
             metric_stats(&session, start_key, end_key)?;
         },
+        Some("clean") => {
+            let matches = matches.subcommand_matches("clean").unwrap();
+
+            let start_key = matches.value_of("start-key");
+            let end_key = matches.value_of("end-key");
+
+            let start_key = match start_key {
+                None => std::i64::MIN,
+                Some(s) => match s.parse::<i64>() {
+                    Ok(n) => n,
+                    Err(_) => {
+                        eprintln!("Could not parse {}", s);
+                        return Ok(())
+                    }
+                }
+            };
+
+            let end_key = match end_key {
+                None => std::i64::MAX,
+                Some(s) => match s.parse::<i64>() {
+                    Ok(n) => n,
+                    Err(_) => {
+                        eprintln!("Could not parse {}", s);
+                        return Ok(())
+                    }
+                }
+            };
+
+            let clean_metrics = matches.is_present("clean-metrics");
+            let clean_directories = matches.is_present("clean-directories");
+
+            metrics_clean(&session, start_key, end_key, clean_metrics, clean_directories)?;
+        },
+        Some("local-clean") => {
+            let matches = matches.subcommand_matches("local-clean").unwrap();
+            let directory = matches.value_of("directory").unwrap();
+
+            metrics_local_clean(&session, directory)?;
+        }
         None => {
             eprintln!("No command was used.");
             return Ok(());
@@ -397,62 +307,3 @@ fn main() -> Result<(), Box<dyn error::Error>> {
 }
 
 
-fn metric_stats(session: &Session, start_key: i64, end_key: i64) -> Result<(), Error> {
-    let q =
-        "SELECT id, name, token(name), config, created_on, updated_on, read_on \
-         FROM biggraphite_metadata.metrics_metadata WHERE token(name) > ? LIMIT 1000";
-
-    let mut current_token = start_key;
-    let mut n = 0;
-    let mut points : u64 = 0;
-
-    let mut stats : HashMap<String, usize> = HashMap::new();
-
-    while current_token < end_key {
-        let mut query = stmt!(q);
-        query.bind(0, current_token)?;
-
-        let results = session.metadata_session().execute(&query).wait()?;
-
-        for row in results.iter() {
-            current_token = row.get_column(2)?.get_i64()?;
-
-            let metric : Metric = row.into();
-            let stages = match metric.stages() {
-                Ok(stages) => stages,
-                Err(_) => continue,
-            };
-
-            for stage in stages {
-                points += stage.points() as u64;
-            }
-
-            let parts = metric.name().split(".").collect::<Vec<&str>>();
-
-            *stats.entry(String::from(parts[0])).or_insert(0) += 1;
-
-            // println!("{}: {}", current_token, metric.name());
-            n += 1;
-        }
-    }
-
-    let p : f64 = ((current_token - start_key) / std::i64::MAX) as f64;
-
-    println!("Range: {} -> {} ({:.4}%)", start_key, current_token, 100. * p);
-    println!("{} metrics", n);
-    println!("{} points", points);
-    println!("-----");
-
-    let mut vec : Vec<(&String, &usize)> = stats.iter().collect();
-    vec.sort_by(|a, b| b.1.cmp(a.1));
-
-    for (id, v) in vec.iter().enumerate() {
-        println!("{} {}", v.0, v.1);
-
-        if id == 10 {
-            break;
-        }
-    }
-
-    Ok(())
-}

src/metric.rs

@@ -10,6 +10,7 @@ use std::fmt;
 use std::convert::TryFrom;
 
 use cassandra_cpp::Row;
+use chrono::Utc;
 
 #[derive(Debug)]
 pub struct Metric {
@@ -29,6 +30,10 @@ impl Metric {
         &self.name
     }
 
+    pub fn updated_on(self: &Self) -> u64 {
+        self.updated_on
+    }
+
     pub fn config(self: &Self, name: String) -> Result<String, String> {
         let res = self.config.get(&name);
         if let Some(v) = res {
@@ -91,14 +96,25 @@ impl From<Row> for Metric {
             Err(_) => {},
         };
 
-        let created_on = row.get_column_by_name("created_on".to_string()).unwrap();
-        let created_on_timestamp = match created_on.get_uuid() {
-            Err(_) => 0,
-            Ok(v) => v.timestamp(),
+        let created_on = row.get_column_by_name("created_on".to_string());
+        let created_on_timestamp = if let Ok(creation_time) = created_on {
+            match creation_time.get_uuid() {
+                Err(_) => 0,
+                Ok(v) => v.timestamp(),
+            }
+        } else {
+            Utc::now().timestamp() as u64
         };
 
-        let updated_on = row.get_column_by_name("updated_on".to_string()).unwrap();
-        let updated_on_timestamp = updated_on.get_uuid().unwrap().timestamp();
+        let updated_on = row.get_column_by_name("updated_on".to_string());
+        let updated_on_timestamp = if let Ok(updated_time) = updated_on {
+            match updated_time.get_uuid() {
+                Err(_) => 0,
+                Ok(v) => v.timestamp(),
+            }
+        } else {
+            Utc::now().timestamp() as u64
+        };
 
         let uuid = match row.get_column_by_name("id".to_string()).unwrap().get_uuid() {
             Ok(v) => v.to_string(),

src/session.rs

@@ -13,6 +13,7 @@ use crate::cassandra::*;
 pub struct Session {
     metadata: CassSession,
     points: CassSession,
+    dry_run: bool,
 }
 
 impl Session {
@@ -23,11 +24,16 @@ impl Session {
         let session = Self {
             metadata: metadata,
             points: points,
+            dry_run: false,
         };
 
         Ok(session)
     }
 
+    pub fn set_dry_run(&mut self, dry_run: bool) {
+        self.dry_run = dry_run
+    }
+
     pub fn metadata_session(&self) -> &CassSession {
         &self.metadata
     }
@@ -45,4 +51,8 @@ impl Session {
     pub fn write_consistency(&self) -> Consistency {
         Consistency::LOCAL_QUORUM
     }
-}
+
+    pub fn is_dry_run(&self) -> bool {
+        self.dry_run
+    }
+}