/*
* Copyright (C) 2013 Facebook, Inc.
*
* Licensed 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 com.facebook.swift.service.guice;
import com.facebook.swift.service.ThriftMethodProcessor;
import com.facebook.swift.service.ThriftMethodStats;
import com.facebook.swift.service.ThriftServiceProcessor;
import com.facebook.swift.service.ThriftServiceStatsHandler;
import com.google.common.base.Throwables;
import com.google.inject.Binder;
import com.google.inject.Module;
import com.google.inject.Provides;
import com.google.inject.Scopes;
import org.weakref.jmx.guice.ExportBinder;
import org.weakref.jmx.guice.MapObjectNameFunction;
import javax.inject.Singleton;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import java.util.Map;
import java.util.concurrent.ConcurrentMap;
import static com.facebook.swift.service.guice.ThriftServiceExporter.thriftServerBinder;
import static java.lang.String.format;
public class ThriftServerStatsModule implements Module
{
@Override
public void configure(Binder binder)
{
binder.bind(ThriftServiceStatsHandler.class).in(Scopes.SINGLETON);
thriftServerBinder(binder).addEventHandler(ThriftServiceStatsHandler.class);
ExportBinder.newExporter(binder).exportMap(ThriftMethodStats.class).withGeneratedName(
new MapObjectNameFunction<String, ThriftMethodStats>()
{
@Override
public ObjectName name(String methodName, ThriftMethodStats methodStats)
{
try {
int dot = methodName.indexOf('.');
String serviceName = methodName.substring(0, dot);
methodName = methodName.substring(dot + 1);
String name = format("com.facebook.swift.server:type=%s,name=%s",
serviceName,
methodName);
return new ObjectName(name);
} catch (MalformedObjectNameException e) {
throw Throwables.propagate(e);
}
}
});
}
@Provides
@Singleton
public Map<String, ThriftMethodStats> getMethodStats(ThriftServiceProcessor thriftServiceProcessor,
ThriftServiceStatsHandler serviceStatsHandler)
{
// populate stats map with method names mapped to empty stat objects and tell JMX to export that
final ConcurrentMap<String, ThriftMethodStats> stats = serviceStatsHandler.getStats();
for (Map.Entry<String, ThriftMethodProcessor> entry: thriftServiceProcessor.getMethods().entrySet()) {
stats.putIfAbsent(entry.getValue().getQualifiedName(), new ThriftMethodStats());
}
return stats;
}
}