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RetryClientWithDelay.java
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RetryClientWithDelay.java
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/*
*******************************************************************************
* Copyright (c) 2016-2020 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* 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 org.eclipse.microprofile.fault.tolerance.tck.retry.clientserver;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.everyItem;
import static org.hamcrest.Matchers.lessThan;
import java.sql.Connection;
import java.time.Duration;
import java.util.HashSet;
import java.util.Set;
import javax.enterprise.context.RequestScoped;
import org.eclipse.microprofile.fault.tolerance.tck.util.TCKConfig;
import org.eclipse.microprofile.faulttolerance.Retry;
/**
* A client to demonstrate the delay configurations
* @author <a href="mailto:emijiang@uk.ibm.com">Emily Jiang</a>
*
*/
@RequestScoped
public class RetryClientWithDelay {
private int counterForInvokingConnenectionService;
private long timestampForConnectionService = 0;
private Set<Duration> delayTimes = new HashSet<>();
// Expect delay between 0-800ms. Set limit to 1000ms to allow a small buffer
private static final Duration MAX_DELAY = TCKConfig.getConfig().getTimeoutInDuration(1000);
//There should be 0-800ms (jitter is -400ms - 400ms) delays between each invocation
//there should be at least 4 retries
@Retry(delay = 400, maxDuration = 3200, jitter = 400, maxRetries = 10) // Adjusted by config
public Connection serviceA() {
return connectionService();
}
//simulate a backend service
private Connection connectionService() {
// record the time delay between each invocation (should be 0-800ms)
long currentTime = System.nanoTime();
if (timestampForConnectionService != 0) {
delayTimes.add(Duration.ofNanos(currentTime - timestampForConnectionService));
}
timestampForConnectionService = currentTime;
counterForInvokingConnenectionService++;
throw new RuntimeException("Connection failed");
}
public void assertDelayInRange() {
assertThat("Delay longer than expected", delayTimes, everyItem(lessThan(MAX_DELAY)));
}
public int getRetryCountForConnectionService() {
return counterForInvokingConnenectionService;
}
}