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* 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.test.junit.rule;
import org.elasticsearch.common.logging.ESLogger;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
/**
* A helper rule to catch all BindTransportExceptions
* and rerun the test for a configured number of times
*
* Note: Be aware, that when a test is repeated, the @After and @Before
* annotated methods are not run a second time
*
*/
public class RepeatOnExceptionRule implements TestRule {
private ESLogger logger;
private int retryCount;
private Class expectedException;
/**
*
* @param logger the es logger from the test class
* @param retryCount number of amounts to try a single test before failing
* @param expectedException The exception class you want to catch
*
*/
public RepeatOnExceptionRule(ESLogger logger, int retryCount, Class expectedException) {
this.logger = logger;
this.retryCount = retryCount;
this.expectedException = expectedException;
}
@Override
public Statement apply(final Statement base, Description description) {
return new Statement() {
@Override
public void evaluate() throws Throwable {
Throwable caughtThrowable = null;
for (int i = 0; i < retryCount; i++) {
try {
base.evaluate();
return;
} catch (Throwable t) {
if (t.getClass().equals(expectedException)) {
caughtThrowable = t;
logger.info("Exception [{}] occurred, rerunning the test after [{}] failures", t, t.getClass().getSimpleName(), i+1);
} else {
throw t;
}
}
}
logger.error("Giving up after [{}] failures... marking test as failed", retryCount);
throw caughtThrowable;
}
};
}
}