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105 changes: 105 additions & 0 deletions
105
enterprise/metrics/src/main/java/org/neo4j/metrics/source/ClusterMetrics.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| /* | ||
| * Copyright (c) 2002-2015 "Neo Technology," | ||
| * Network Engine for Objects in Lund AB [http://neotechnology.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License as | ||
| * published by the Free Software Foundation, either version 3 of the | ||
| * License, or (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Affero General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.metrics.source; | ||
|
|
||
| import com.codahale.metrics.Gauge; | ||
| import com.codahale.metrics.MetricRegistry; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.concurrent.atomic.AtomicLong; | ||
|
|
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| import org.neo4j.kernel.configuration.Config; | ||
| import org.neo4j.kernel.ha.SlaveUpdatePuller; | ||
| import org.neo4j.kernel.lifecycle.LifecycleAdapter; | ||
| import org.neo4j.kernel.monitoring.Monitors; | ||
| import org.neo4j.metrics.MetricsSettings; | ||
|
|
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| import static com.codahale.metrics.MetricRegistry.name; | ||
|
|
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| public class ClusterMetrics extends LifecycleAdapter | ||
| { | ||
| private static final String NAME_PREFIX = "neo4j.cluster"; | ||
| private static final String SLAVE_PULL_UPDATES = name( NAME_PREFIX, "slave_pull_updates" ); | ||
| private static final String SLAVE_PULL_UPDATE_UP_TO_TX = name( NAME_PREFIX, "slave_pull_update_up_to_tx" ); | ||
|
|
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| private final Config config; | ||
| private final Monitors monitors; | ||
| private final MetricRegistry registry; | ||
| private final SlaveUpdatePullerMonitor monitor = new SlaveUpdatePullerMonitor(); | ||
|
|
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| public ClusterMetrics( Config config, Monitors monitors, MetricRegistry registry ) | ||
| { | ||
| this.config = config; | ||
| this.monitors = monitors; | ||
| this.registry = registry; | ||
| } | ||
|
|
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| @Override | ||
| public void start() throws Throwable | ||
| { | ||
| if ( config.get( MetricsSettings.neoClusterEnabled ) ) | ||
| { | ||
| monitors.addMonitorListener( monitor ); | ||
|
|
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| registry.register( SLAVE_PULL_UPDATES, new Gauge<Long>() | ||
| { | ||
| @Override | ||
| public Long getValue() | ||
| { | ||
| return monitor.events.get(); | ||
| } | ||
| } ); | ||
|
|
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| registry.register( SLAVE_PULL_UPDATE_UP_TO_TX, new Gauge<Long>() | ||
| { | ||
| @Override | ||
| public Long getValue() | ||
| { | ||
| return monitor.lastAppliedTxId; | ||
| } | ||
| } ); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void stop() throws IOException | ||
| { | ||
| if ( config.get( MetricsSettings.neoClusterEnabled ) ) | ||
| { | ||
| registry.remove( SLAVE_PULL_UPDATES ); | ||
| registry.remove( SLAVE_PULL_UPDATE_UP_TO_TX ); | ||
|
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| monitors.removeMonitorListener( monitor ); | ||
| } | ||
| } | ||
|
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| private static class SlaveUpdatePullerMonitor implements SlaveUpdatePuller.Monitor | ||
| { | ||
| private AtomicLong events = new AtomicLong(); | ||
| private volatile long lastAppliedTxId; | ||
|
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| @Override | ||
| public void pulledUpdates( long lastAppliedTxId ) | ||
| { | ||
| events.incrementAndGet(); | ||
| this.lastAppliedTxId = lastAppliedTxId; | ||
| } | ||
| } | ||
| } |
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