Implementing "local_clean" command.

src/cassandra.rs

@@ -4,6 +4,8 @@
  * Author: Patrick MARIE <pm@mkz.me>
  */
 use std::str::FromStr;
+use std::fmt;
+use std::error;
 
 use crate::metric::Metric;
 use crate::session::Session;
@@ -17,6 +19,17 @@ use cassandra_cpp::{set_level,stmt};
 
 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);
 
@@ -147,14 +160,17 @@ pub fn prepare_component_query_globstar(table_name: &str, arguments: &Vec<&str>)
     Ok(out)
 }
 
-pub fn fetch_metric(session: &Session, metric_name: &str) -> Result<Metric, Error> {
+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
+    let result = session.metadata_session().execute(&query).wait()?;
-    // query.set_consistency(session.read_consistency());
+
+    if result.row_count() == 0 {
+        return Err(NoRecord.into());
+    }
 
-    let result =  session.metadata_session().execute(&query).wait()?;
     Ok(result.first_row().unwrap().into())
 }
 
@@ -311,3 +327,33 @@ pub fn create_metric(session: &Session, metric: &str) -> Result<(), Error> {
     Ok(())
 }
 
+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 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 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 delete_directory(session: &Session, name: &str) -> Result<(), Error> {
+    let namespace = "biggraphite_metadata";
+    let delete_directory_query = format!("DELETE FROM {}.directories WHERE name = ?;", namespace);
+
+    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

@@ -7,5 +7,6 @@ pub mod clean;
 pub mod delete;
 pub mod info;
 pub mod list;
+pub mod local_clean;
 pub mod stats;
 pub mod write;

src/cmd/delete.rs

@@ -3,14 +3,15 @@
  *
  * Author: Patrick MARIE <pm@mkz.me>
  */
+use std::error;
 
 use cassandra_cpp::stmt;
-use cassandra_cpp::{BindRustType,Error};
+use cassandra_cpp::BindRustType;
 use crate::fetch_metric;
 
 use crate::Session;
 
-pub fn metric_delete(session: &Session, metric_name: &str) -> Result<(), Error> {
+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)?;
 

src/cmd/info.rs

@@ -3,12 +3,12 @@
  *
  * Author: Patrick MARIE <pm@mkz.me>
  */
+use std::error;
+
 use crate::Session;
-
 use crate::fetch_metric;
-use cassandra_cpp::Error;
 
-pub fn metric_info(session: &Session, metric_name: &str) -> Result<(), Error> {
+pub fn metric_info(session: &Session, metric_name: &str) -> Result<(), Box<dyn error::Error>> {
     let metric = fetch_metric(session, metric_name)?;
 
     println!("{}", metric);

src/cmd/list.rs

@@ -38,7 +38,13 @@ pub fn metric_list(session: &Session, glob: &str) -> Result<(), Error> {
     }
 
     for result in results {
-        let rows = result.wait()?;
+        let res = result.wait();
+        if let Err(err) = res {
+            eprintln!("Query failed: {}", err);
+            continue;
+        }
+
+        let rows = res.unwrap();
         let names = rows
             .iter()
             .map(|x| {

src/cmd/local_clean.rs

@@ -0,0 +1,129 @@
+/*
+ * 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());
+            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);
+            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/write.rs

@@ -3,6 +3,7 @@
  *
  * Author: Patrick MARIE <pm@mkz.me>
  */
+use std::error;
 use std::str::FromStr;
 
 use crate::Session;
@@ -12,12 +13,12 @@ use crate::create_metric;
 use crate::fetch_metric;
 
 use cassandra_cpp::stmt;
-use cassandra_cpp::{BindRustType,Error};
+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<(), Error> {
+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)?;
 

src/main.rs

@@ -26,6 +26,7 @@ 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::*;
 
@@ -110,7 +111,7 @@ fn main() -> Result<(), Box<dyn error::Error>> {
                                              .long("end-key")
                                              .takes_value(true)))
                            .subcommand(SubCommand::with_name("clean")
-                                        .about("Stats")
+                                        .about("Clean outdated metrics & empty directories")
                                         .arg(Arg::with_name("start-key")
                                              .long("start-key")
                                              .takes_value(true))
@@ -121,6 +122,9 @@ fn main() -> Result<(), Box<dyn error::Error>> {
                                              .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")))
                            .get_matches();
 
     let mut contact_points_metadata = "localhost";
@@ -278,6 +282,12 @@ fn main() -> Result<(), Box<dyn error::Error>> {
 
             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(());

src/metric.rs

@@ -29,6 +29,10 @@ 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 {