| /* |
| * 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.drill.exec.testing; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import com.google.common.base.Preconditions; |
| import org.slf4j.Logger; |
| |
| /** |
| * Injects exceptions and pauses at execution time for testing. Any class that wants to simulate exceptions |
| * or inject pauses for testing should have it's own private static instance of an injector (similar to the use |
| * of loggers). Injection site either use {@link FragmentContextImpl} or |
| * {@link org.apache.drill.exec.ops.QueryContext}. |
| * See {@link ControlsInjector} for documentation. |
| */ |
| public class ExecutionControlsInjector implements ControlsInjector { |
| |
| private final Class<?> clazz; // the class that owns this injector |
| |
| /** |
| * Constructor. Classes should use the static {@link ControlsInjectorFactory#getInjector} method to obtain their |
| * injector. |
| * |
| * @param clazz the owning class |
| */ |
| protected ExecutionControlsInjector(final Class<?> clazz) { |
| this.clazz = clazz; |
| } |
| |
| @Override |
| public Class<?> getSiteClass() { |
| return clazz; |
| } |
| |
| @Override |
| public void injectUnchecked(final ExecutionControls executionControls, final String desc) { |
| Preconditions.checkNotNull(executionControls); |
| final ExceptionInjection exceptionInjection = executionControls.lookupExceptionInjection(this, desc); |
| if (exceptionInjection != null) { |
| exceptionInjection.throwUnchecked(); |
| } |
| } |
| |
| @Override |
| public <T extends Throwable> void injectChecked(final ExecutionControls executionControls, final String desc, |
| final Class<T> exceptionClass) throws T { |
| Preconditions.checkNotNull(executionControls); |
| final ExceptionInjection exceptionInjection = executionControls.lookupExceptionInjection(this, desc); |
| if (exceptionInjection != null) { |
| exceptionInjection.throwChecked(exceptionClass); |
| } |
| } |
| |
| @Override |
| public void injectPause(final ExecutionControls executionControls, final String desc, final Logger logger) { |
| Preconditions.checkNotNull(executionControls); |
| final PauseInjection pauseInjection = |
| executionControls.lookupPauseInjection(this, desc); |
| |
| if (pauseInjection != null) { |
| long pauseDuration = pauseInjection.getMsPause(); |
| if ( pauseDuration > 0L) { |
| logger.debug("Pausing at {} for {} sec", desc, TimeUnit.MILLISECONDS.toSeconds(pauseDuration) ); |
| } else { |
| logger.debug("Pausing at {}", desc); |
| } |
| pauseInjection.pause(); |
| logger.debug("Resuming at {}", desc); |
| } |
| } |
| |
| @Override |
| public void injectInterruptiblePause(final ExecutionControls executionControls, final String desc, |
| final Logger logger) throws InterruptedException { |
| Preconditions.checkNotNull(executionControls); |
| final PauseInjection pauseInjection = executionControls.lookupPauseInjection(this, desc); |
| |
| if (pauseInjection != null) { |
| logger.debug("Interruptible pausing at {}", desc); |
| try { |
| pauseInjection.interruptiblePause(); |
| } catch (final InterruptedException e) { |
| logger.debug("Pause interrupted at {}", desc); |
| throw e; |
| } |
| logger.debug("Interruptible pause resuming at {}", desc); |
| } |
| } |
| |
| @Override |
| public CountDownLatchInjection getLatch(final ExecutionControls executionControls, final String desc) { |
| Preconditions.checkNotNull(executionControls); |
| return executionControls.lookupCountDownLatchInjection(this, desc); |
| } |
| } |