/hudson-remoting/src/main/java/hudson/remoting/Command.java
http://github.com/hudson/hudson · Java · 90 lines · 31 code · 12 blank · 47 comment · 2 complexity · c5725fcd391192ee0513a96cb99e0780 MD5 · raw file
- /*
- * The MIT License
- *
- * Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
- package hudson.remoting;
- import java.io.Serializable;
- /**
- * One-way command to be sent over to the remote system and executed there.
- * This is layer 0, the lower most layer.
- * <p/>
- * <p/>
- * At this level, remoting of class files are not provided, so both {@link Channel}s
- * need to have the definition of {@link Command}-implementation.
- *
- * @author Kohsuke Kawaguchi
- */
- abstract class Command implements Serializable {
- /**
- * This exception captures the stack trace of where the Command object is created.
- * This is useful for diagnosing the error when command fails to execute on the remote peer.
- */
- public final Exception createdAt;
- protected Command() {
- this(true);
- }
- protected Command(Throwable cause) {
- this.createdAt = new Source(cause);
- }
- /**
- * @param recordCreatedAt If false, skip the recording of where the command is created. This makes the trouble-shooting
- * and cause/effect correlation hard in case of a failure, but it will reduce the amount of the data
- * transferred.
- */
- protected Command(boolean recordCreatedAt) {
- if (recordCreatedAt) {
- this.createdAt = new Source();
- } else {
- this.createdAt = null;
- }
- }
- /**
- * Called on a remote system to perform this command.
- *
- * @param channel The {@link Channel} of the remote system.
- */
- protected abstract void execute(Channel channel);
- private static final long serialVersionUID = 1L;
- private final class Source extends Exception {
- public Source() {
- }
- private Source(Throwable cause) {
- super(cause);
- }
- public String toString() {
- return "Command " + Command.this.toString() + " created at";
- }
- private static final long serialVersionUID = 1L;
- }
- }