| /* |
| * 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.geode.test.dunit.internal; |
| |
| import static java.lang.System.lineSeparator; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.ObjectOutputStream; |
| import java.io.PrintWriter; |
| import java.io.Serializable; |
| import java.io.StringWriter; |
| |
| /** |
| * The result of a {@link MethodInvoker} method invocation. |
| */ |
| public class MethodInvokerResult implements Serializable { |
| |
| /** |
| * A "result" object that indicates that an exception occurred while invoking the method |
| */ |
| public static final Serializable EXCEPTION_OCCURRED = new Serializable() { |
| |
| @Override |
| public boolean equals(Object obj) { |
| // Allows instances to be compared across VMs |
| return obj != null && getClass().equals(obj.getClass()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return getClass().hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return "EXCEPTION_OCCURRED"; |
| } |
| }; |
| |
| /** The result of execution (may be an exception or error type) */ |
| private final Object result; |
| |
| /** The exception that resulted from invoking the method */ |
| private final Throwable exception; |
| |
| /** Stack trace information (if applicable) */ |
| private String stackTrace; |
| |
| MethodInvokerResult(Object result) { |
| this.result = result; |
| exception = null; |
| } |
| |
| /** |
| * This constructor is invoked when invoking a method resulted in an exception being thrown. The |
| * "result" is set to {@link #EXCEPTION_OCCURRED}. If the exception could not be serialized, |
| * {@link #getException()} will return IOException with the exception stack as the message. |
| */ |
| MethodInvokerResult(Throwable throwable) { |
| result = EXCEPTION_OCCURRED; |
| exception = checkSerializable(throwable); |
| stackTrace = toStackTrace(throwable); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(getResult()); |
| sb.append(lineSeparator()); |
| if (getStackTrace() != null) { |
| sb.append(getStackTrace()); |
| } |
| return sb.toString(); |
| } |
| |
| /** |
| * Returns the result of the method call. If an exception was thrown during the method call, |
| * {@link #EXCEPTION_OCCURRED} is returned. |
| * |
| * @see #exceptionOccurred() |
| */ |
| public Object getResult() { |
| return result; |
| } |
| |
| /** |
| * Returns the stack trace of the exception that was thrown while invoking a method. If no |
| * exception was thrown, <code>null</code> is returned. |
| */ |
| public String getStackTrace() { |
| return stackTrace; |
| } |
| |
| /** |
| * Returns the exception that was thrown while invoking a method. If no exception was thrown, |
| * <code>null</code> is returned. |
| */ |
| public Throwable getException() { |
| return exception; |
| } |
| |
| /** |
| * Returns whether or not an exception occurred while invoking the method |
| */ |
| public boolean exceptionOccurred() { |
| return EXCEPTION_OCCURRED.equals(result); |
| } |
| |
| private static String toStackTrace(Throwable throwable) { |
| StringWriter sw = new StringWriter(); |
| throwable.printStackTrace(new PrintWriter(sw, true)); |
| return sw.toString(); |
| } |
| |
| private static Throwable checkSerializable(Throwable throwable) { |
| try (ObjectOutputStream oos = new ObjectOutputStream(new ByteArrayOutputStream())) { |
| oos.writeObject(throwable); |
| return throwable; |
| |
| } catch (IOException e) { |
| StringWriter sw = new StringWriter(); |
| e.printStackTrace(new PrintWriter(sw, true)); |
| return new IOException(sw.toString()); |
| } |
| } |
| } |