/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.hadoop.integration.cascading;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import org.elasticsearch.hadoop.mr.Counter;
import org.elasticsearch.hadoop.util.ReflectionUtils;
import cascading.flow.Flow;
import cascading.stats.CascadingStats;
public abstract class StatsUtils {
@SuppressWarnings("rawtypes")
public static Flow proxy(final Flow flow) {
Flow proxy = (Flow) Proxy.newProxyInstance(Flow.class.getClassLoader(), new Class[] { Flow.class }, new InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
Object invocation = ReflectionUtils.invoke(method, flow, args);
if ("complete".equals(method.getName())) {
printStats(flow);
}
return invocation;
}
});
return proxy;
}
private static void printStats(Flow flow) {
CascadingStats stats = flow.getStats();
System.out.println("Cascading stats for " + Counter.class.getName());
for (String counter : stats.getCountersFor(Counter.class)) {
System.out.println(String.format("%s\t%s", counter, stats.getCounterValue(Counter.class.getName(), counter)));
}
}
}