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/*
*
* Derby - Class org.apache.derbyTesting.system.oe.client.MultiThreadSubmitter
*
* 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.derbyTesting.system.oe.client;
/**
* Execute transactions using multiple threads.
* A single thread uses a single submitter,
* submitters are created outside of this class.
*/
public class MultiThreadSubmitter {
/**
* Execute count transactions per submitter
* using a newly created thread for each
* submitter. In total (count*submitter.length)
* transactions will be executed. The time returned
* will be the time to execute all the transactions.
*
* Each submitter will have its clearTransactionCount called
* before the run.
*
* @param submitters Submitters to use.
* @param displays Displays for each submitter.
* If null then null will be passed into each transaction
* execution
* @param count Number of transactions per thread.
* @return Time to excute all of the transactions.
*/
public static long multiRun(
Submitter[] submitters,
Object[] displays,
int count) {
Thread[] threads = new Thread[submitters.length];
for (int i = 0; i < submitters.length; i++) {
submitters[i].clearTransactionCount();
Object displayData = displays == null ? null : displays[i];
threads[i] = newThread(i, submitters[i], displayData, count);
}
// Start all the threads
long start = System.currentTimeMillis();
for (int i = 0; i < threads.length; i++)
threads[i].start();
// and then wait for them to finish
for (int i = 0; i < threads.length; i++) {
try {
threads[i].join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
long end = System.currentTimeMillis();
return end - start;
}
/**
* Return a thread that will run count transactions using a submitter.
*
* @param threadId
* Number of thread.
* @param submitter
* Submitter
* @param displayData
* DisplayData for this submitter
* @param count
* Number of transactions to run.
*
* @return Thread (not started)
*/
private static Thread newThread(final int threadId,
final Submitter submitter,
final Object displayData, final int count) {
Thread t = new Thread("OE_Thread:" + threadId) {
public void run() {
try {
submitter.runTransactions(displayData, count);
} catch (Exception e) {
e.printStackTrace();
}
}
};
return t;
}
}
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