/**
* Copyright 2010 The Apache Software Foundation
*
* 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.hbase.ipc;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.ipc.VersionedProtocol;
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.*;
import java.lang.reflect.Method;
/**
*
* 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 HBaseRpcMetrics implements Updater {
public static final String NAME_DELIM = "$";
private final MetricsRegistry registry = new MetricsRegistry();
private final MetricsRecord metricsRecord;
private static Log LOG = LogFactory.getLog(HBaseRpcMetrics.class);
private final HBaseRPCStatistics rpcStatistics;
public HBaseRpcMetrics(String hostName, String port) {
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);
initMethods(HMasterInterface.class);
initMethods(HMasterRegionInterface.class);
initMethods(HRegionInterface.class);
rpcStatistics = new HBaseRPCStatistics(this.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 final MetricsTimeVaryingLong receivedBytes =
new MetricsTimeVaryingLong("ReceivedBytes", registry);
public final MetricsTimeVaryingLong sentBytes =
new MetricsTimeVaryingLong("SentBytes", registry);
public final MetricsTimeVaryingRate rpcQueueTime =
new MetricsTimeVaryingRate("RpcQueueTime", registry);
public MetricsTimeVaryingRate rpcProcessingTime =
new MetricsTimeVaryingRate("RpcProcessingTime", registry);
public final MetricsIntValue numOpenConnections =
new MetricsIntValue("NumOpenConnections", registry);
public final MetricsIntValue callQueueLen =
new MetricsIntValue("callQueueLen", registry);
public final MetricsIntValue priorityCallQueueLen =
new MetricsIntValue("priorityCallQueueLen", registry);
public final MetricsTimeVaryingInt authenticationFailures =
new MetricsTimeVaryingInt("rpcAuthenticationFailures", registry);
public final MetricsTimeVaryingInt authenticationSuccesses =
new MetricsTimeVaryingInt("rpcAuthenticationSuccesses", registry);
public final MetricsTimeVaryingInt authorizationFailures =
new MetricsTimeVaryingInt("rpcAuthorizationFailures", registry);
public final MetricsTimeVaryingInt authorizationSuccesses =
new MetricsTimeVaryingInt("rpcAuthorizationSuccesses", registry);
public MetricsTimeVaryingRate rpcSlowResponseTime =
new MetricsTimeVaryingRate("RpcSlowResponse", registry);
private void initMethods(Class<? extends VersionedProtocol> protocol) {
for (Method m : protocol.getDeclaredMethods()) {
if (get(m.getName()) == null)
create(m.getName());
}
}
private MetricsTimeVaryingRate get(String key) {
return (MetricsTimeVaryingRate) registry.get(key);
}
private MetricsTimeVaryingRate create(String key) {
return new MetricsTimeVaryingRate(key, this.registry);
}
public void inc(String name, int amt) {
MetricsTimeVaryingRate m = get(name);
if (m == null) {
LOG.warn("Got inc() request for method that doesnt exist: " +
name);
return; // ignore methods that dont exist.
}
m.inc(amt);
}
/**
* Generate metrics entries for all the methods defined in the list of
* interfaces. A {@link MetricsTimeVaryingRate} counter will be created for
* each {@code Class.getMethods().getName()} entry.
* @param ifaces Define metrics for all methods in the given classes
*/
public void createMetrics(Class<?>[] ifaces) {
createMetrics(ifaces, false);
}
/**
* Generate metrics entries for all the methods defined in the list of
* interfaces. A {@link MetricsTimeVaryingRate} counter will be created for
* each {@code Class.getMethods().getName()} entry.
*
* <p>
* If {@code prefixWithClass} is {@code true}, each metric will be named as
* {@code [Class.getSimpleName()].[Method.getName()]}. Otherwise each metric
* will just be named according to the method -- {@code Method.getName()}.
* </p>
* @param ifaces Define metrics for all methods in the given classes
* @param prefixWithClass If {@code true}, each metric will be named as
* "classname.method"
*/
public void createMetrics(Class<?>[] ifaces, boolean prefixWithClass) {
createMetrics(ifaces, prefixWithClass, null);
}
/**
* Generate metrics entries for all the methods defined in the list of
* interfaces. A {@link MetricsTimeVaryingRate} counter will be created for
* each {@code Class.getMethods().getName()} entry.
*
* <p>
* If {@code prefixWithClass} is {@code true}, each metric will be named as
* {@code [Class.getSimpleName()].[Method.getName()]}. Otherwise each metric
* will just be named according to the method -- {@code Method.getName()}.
* </p>
*
* <p>
* Additionally, if {@code suffixes} is defined, additional metrics will be
* created for each method named as the original metric concatenated with
* the suffix.
* </p>
* @param ifaces Define metrics for all methods in the given classes
* @param prefixWithClass If {@code true}, each metric will be named as
* "classname.method"
* @param suffixes If not null, each method will get additional metrics ending
* in each of the suffixes.
*/
public void createMetrics(Class<?>[] ifaces, boolean prefixWithClass,
String [] suffixes) {
for (Class<?> iface : ifaces) {
Method[] methods = iface.getMethods();
for (Method method : methods) {
String attrName = prefixWithClass ?
getMetricName(iface, method.getName()) : method.getName();
if (get(attrName) == null)
create(attrName);
if (suffixes != null) {
// create metrics for each requested suffix
for (String s : suffixes) {
String metricName = attrName + s;
if (get(metricName) == null)
create(metricName);
}
}
}
}
}
public static String getMetricName(Class<?> c, String method) {
return c.getSimpleName() + NAME_DELIM + method;
}
/**
* Push the metrics to the monitoring subsystem on doUpdate() call.
*/
public void doUpdates(final MetricsContext context) {
// Both getMetricsList() and pushMetric() are thread-safe
for (MetricsBase m : registry.getMetricsList()) {
m.pushMetric(metricsRecord);
}
metricsRecord.update();
}
public void shutdown() {
if (rpcStatistics != null)
rpcStatistics.shutdown();
}
}