| /* |
| * 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.sling.ide.test.impl.helpers; |
| |
| import static org.junit.Assert.assertThat; |
| |
| import java.util.concurrent.Callable; |
| |
| import org.hamcrest.Matcher; |
| |
| import junit.framework.AssertionFailedError; |
| |
| public class Poller { |
| |
| private static final long DEFAULT_POLL_WAIT_MILLIS = 5000; |
| private static final long DEFAULT_DELAY_MILLIS = 100; |
| |
| private long timeoutMillis; |
| |
| public Poller() { |
| this(DEFAULT_POLL_WAIT_MILLIS); |
| } |
| |
| public Poller(long timeoutMillis) { |
| this.timeoutMillis = timeoutMillis; |
| } |
| |
| public void pollUntilSuccessful(Runnable r) throws InterruptedException { |
| |
| long cutoff = System.currentTimeMillis() + timeoutMillis; |
| |
| Throwable lastError = null; |
| |
| while (true) { |
| |
| try { |
| r.run(); |
| break; |
| } catch (RuntimeException| AssertionError e) { |
| lastError = e; |
| // skip |
| } |
| |
| if (System.currentTimeMillis() >= cutoff) { |
| |
| if (lastError instanceof RuntimeException) { |
| throw (RuntimeException) lastError; |
| } else if (lastError instanceof Error) { |
| throw (Error) lastError; |
| } |
| |
| throw new AssertionFailedError("Runnable " + r + " did not succeed in the allocated " |
| + timeoutMillis + " ms"); |
| } |
| |
| Thread.sleep(DEFAULT_DELAY_MILLIS); |
| } |
| } |
| |
| public <V> V pollUntil(final Callable<V> callable, final Matcher<V> matcher) throws InterruptedException { |
| |
| final Object[] holder = new Object[1]; |
| |
| pollUntilSuccessful(new Runnable() { |
| @Override |
| public void run() { |
| V result; |
| try { |
| result = callable.call(); |
| holder[0] = result; |
| } catch (RuntimeException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| assertThat(result, matcher); |
| } |
| |
| @Override |
| public String toString() { |
| return callable.toString(); |
| } |
| }); |
| |
| // safe, since only we write in holder[0] |
| return (V) holder[0]; |
| } |
| } |