| /* |
| * 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 org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.StringJoiner; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| /** |
| * The base class for all types of injections (currently, pause and exception). |
| */ |
| public abstract class Injection { |
| |
| private static final Logger logger = LoggerFactory.getLogger(Injection.class); |
| |
| protected final String address; // the address of the drillbit on which to inject |
| protected final int port; // user port of the drillbit; useful when there are multiple drillbits on same machine |
| protected final Class<?> siteClass; // the class where the injection should happen |
| protected final String desc; // description of the injection site; useful for multiple exception injections in a single class |
| private final AtomicInteger nSkip; // the number of times to skip the injection; starts >= 0 |
| private final AtomicInteger nFire; // the number of times to do the injection, after any skips; starts > 0 |
| private final long msPause; // duration of the injection (only applies to pause injections) |
| |
| protected Injection(final String address, final int port, final String siteClass, final String desc, |
| final int nSkip, final int nFire, final long msPause) throws InjectionConfigurationException { |
| if (desc == null || desc.isEmpty()) { |
| throw new InjectionConfigurationException("Injection desc is null or empty."); |
| } |
| |
| if (nSkip < 0) { |
| throw new InjectionConfigurationException("Injection nSkip is not non-negative."); |
| } |
| |
| if (nFire <= 0) { |
| throw new InjectionConfigurationException("Injection nFire is non-positive."); |
| } |
| try { |
| this.siteClass = Class.forName(siteClass); |
| } catch (ClassNotFoundException e) { |
| throw new InjectionConfigurationException("Injection siteClass not found.", e); |
| } |
| |
| this.address = address; |
| this.port = port; |
| this.desc = desc; |
| this.nSkip = new AtomicInteger(nSkip); |
| this.nFire = new AtomicInteger(nFire); |
| this.msPause = msPause; |
| } |
| |
| /** |
| * This function checks if it is the right time for the injection to happen. |
| * |
| * @return if the injection should be injected now |
| */ |
| protected boolean injectNow() { |
| if(logger.isDebugEnabled()) { |
| logger.debug(toString()); |
| } |
| return nSkip.decrementAndGet() < 0 && nFire.decrementAndGet() >= 0; |
| } |
| |
| public String getDesc() { |
| return desc; |
| } |
| |
| public Class<?> getSiteClass() { |
| return siteClass; |
| } |
| |
| // If the address is null, the injection must happen on every drillbit that reaches the specified site. |
| public final boolean isValidForBit(final DrillbitEndpoint endpoint) { |
| return address == null || |
| (address.equals(endpoint.getAddress()) && port == endpoint.getUserPort()); |
| } |
| |
| public long getMsPause() { |
| return msPause; |
| } |
| |
| @Override |
| public String toString() { |
| return new StringJoiner(", ", Injection.class.getSimpleName() + "[", "]") |
| .add("address='" + address + "'") |
| .add("port=" + port) |
| .add("siteClass=" + siteClass) |
| .add("desc='" + desc + "'") |
| .add("nSkip=" + nSkip) |
| .add("nFire=" + nFire) |
| .add("msPause=" + msPause) |
| .toString(); |
| } |
| } |