RpcMetrics.java
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上传日期:2018-01-08
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- /**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.apache.hadoop.ipc.metrics;
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
- import org.apache.hadoop.ipc.Server;
- import org.apache.hadoop.metrics.MetricsContext;
- import org.apache.hadoop.metrics.MetricsRecord;
- import org.apache.hadoop.metrics.MetricsUtil;
- import org.apache.hadoop.metrics.Updater;
- import org.apache.hadoop.metrics.util.MetricsBase;
- import org.apache.hadoop.metrics.util.MetricsIntValue;
- import org.apache.hadoop.metrics.util.MetricsRegistry;
- import org.apache.hadoop.metrics.util.MetricsTimeVaryingRate;
- /**
- *
- * This class is for maintaining the various RPC statistics
- * and publishing them through the metrics interfaces.
- * This also registers the JMX MBean for RPC.
- * <p>
- * This class has a number of metrics variables that are publicly accessible;
- * these variables (objects) have methods to update their values;
- * for example:
- * <p> {@link #rpcQueueTime}.inc(time)
- *
- */
- public class RpcMetrics implements Updater {
- public MetricsRegistry registry = new MetricsRegistry();
- private MetricsRecord metricsRecord;
- private Server myServer;
- private static Log LOG = LogFactory.getLog(RpcMetrics.class);
- RpcActivityMBean rpcMBean;
-
- public RpcMetrics(String hostName, String port, Server server) {
- myServer = server;
- MetricsContext context = MetricsUtil.getContext("rpc");
- metricsRecord = MetricsUtil.createRecord(context, "metrics");
- metricsRecord.setTag("port", port);
- LOG.info("Initializing RPC Metrics with hostName="
- + hostName + ", port=" + port);
- context.registerUpdater(this);
-
- // Need to clean up the interface to RpcMgt - don't need both metrics and server params
- rpcMBean = new RpcActivityMBean(registry, hostName, port);
- }
-
-
- /**
- * The metrics variables are public:
- * - they can be set directly by calling their set/inc methods
- * -they can also be read directly - e.g. JMX does this.
- */
- public MetricsTimeVaryingRate rpcQueueTime =
- new MetricsTimeVaryingRate("RpcQueueTime", registry);
- public MetricsTimeVaryingRate rpcProcessingTime =
- new MetricsTimeVaryingRate("RpcProcessingTime", registry);
- public MetricsIntValue numOpenConnections =
- new MetricsIntValue("NumOpenConnections", registry);
- public MetricsIntValue callQueueLen =
- new MetricsIntValue("callQueueLen", registry);
-
- /**
- * Push the metrics to the monitoring subsystem on doUpdate() call.
- */
- public void doUpdates(MetricsContext context) {
-
- synchronized (this) {
- // ToFix - fix server to use the following two metrics directly so
- // the metrics do not have be copied here.
- numOpenConnections.set(myServer.getNumOpenConnections());
- callQueueLen.set(myServer.getCallQueueLen());
- for (MetricsBase m : registry.getMetricsList()) {
- m.pushMetric(metricsRecord);
- }
- }
- metricsRecord.update();
- }
- public void shutdown() {
- if (rpcMBean != null)
- rpcMBean.shutdown();
- }
- }