/*
* 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.brooklyn.util.core.task.system.internal;
import java.util.Arrays;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.brooklyn.config.ConfigKey;
import org.apache.brooklyn.core.mgmt.BrooklynTaskTags;
import org.apache.brooklyn.location.ssh.SshMachineLocation;
import org.apache.brooklyn.util.core.task.TaskBuilder;
import org.apache.brooklyn.util.core.task.system.ProcessTaskFactory;
import org.apache.brooklyn.util.core.task.system.ProcessTaskStub;
import org.apache.brooklyn.util.core.task.system.ProcessTaskWrapper;
import org.apache.brooklyn.util.stream.Streams;
import org.apache.brooklyn.util.text.Strings;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import com.google.common.collect.Iterables;
public abstract class AbstractProcessTaskFactory<T extends AbstractProcessTaskFactory<T,RET>,RET> extends ProcessTaskStub implements ProcessTaskFactory<RET> {
private static final Logger log = LoggerFactory.getLogger(AbstractProcessTaskFactory.class);
protected boolean dirty = false;
public AbstractProcessTaskFactory(String ...commands) {
this.commands.addAll(Arrays.asList(commands));
}
@SuppressWarnings("unchecked")
protected T self() { return (T)this; }
protected void markDirty() {
dirty = true;
}
@Override
public T add(String ...commandsToAdd) {
markDirty();
for (String commandToAdd: commandsToAdd) this.commands.add(commandToAdd);
return self();
}
@Override
public T add(Iterable<String> commandsToAdd) {
Iterables.addAll(this.commands, commandsToAdd);
return self();
}
@Override
public T machine(SshMachineLocation machine) {
markDirty();
this.machine = machine;
return self();
}
@Override
public T requiringExitCodeZero() {
markDirty();
requireExitCodeZero = true;
return self();
}
@Override
public T requiringExitCodeZero(String extraErrorMessage) {
markDirty();
requireExitCodeZero = true;
this.extraErrorMessage = extraErrorMessage;
return self();
}
@Override
public T allowingNonZeroExitCode() {
markDirty();
requireExitCodeZero = false;
return self();
}
@Override
public ProcessTaskFactory<Boolean> returningIsExitCodeZero() {
if (requireExitCodeZero==null) allowingNonZeroExitCode();
return returning(new Function<ProcessTaskWrapper<?>,Boolean>() {
public Boolean apply(ProcessTaskWrapper<?> input) {
return input.getExitCode()==0;
}
});
}
@Override
public ProcessTaskFactory<String> requiringZeroAndReturningStdout() {
requiringExitCodeZero();
return this.<String>returning(ScriptReturnType.STDOUT_STRING);
}
@Override
@SuppressWarnings("unchecked")
public <RET2> ProcessTaskFactory<RET2> returning(ScriptReturnType type) {
markDirty();
returnType = Preconditions.checkNotNull(type);
return (ProcessTaskFactory<RET2>) self();
}
@Override
@SuppressWarnings("unchecked")
public <RET2> ProcessTaskFactory<RET2> returning(Function<ProcessTaskWrapper<?>, RET2> resultTransformation) {
markDirty();
returnType = ScriptReturnType.CUSTOM;
this.returnResultTransformation = resultTransformation;
return (ProcessTaskFactory<RET2>) self();
}
@Override
public T runAsCommand() {
markDirty();
runAsScript = false;
return self();
}
@Override
public T runAsScript() {
markDirty();
runAsScript = true;
return self();
}
@Override
public T runAsRoot() {
markDirty();
runAsRoot = true;
return self();
}
@Override
public T environmentVariable(String key, String val) {
markDirty();
shellEnvironment.put(key, val);
return self();
}
@Override
public T environmentVariables(Map<String,String> vars) {
if (vars!=null) {
markDirty();
shellEnvironment.putAll(vars);
}
return self();
}
/** creates the TaskBuilder which can be further customized; typically invoked by the initial {@link #newTask()} */
public TaskBuilder<Object> constructCustomizedTaskBuilder() {
TaskBuilder<Object> tb = TaskBuilder.builder().dynamic(false).displayName("ssh: "+getSummary());
tb.tag(BrooklynTaskTags.tagForStream(BrooklynTaskTags.STREAM_STDIN,
Streams.byteArrayOfString(Strings.join(commands, "\n"))));
tb.tag(BrooklynTaskTags.tagForEnvStream(BrooklynTaskTags.STREAM_ENV, shellEnvironment));
return tb;
}
@Override
public T summary(String summary) {
markDirty();
this.summary = summary;
return self();
}
@Override
public <V> T configure(ConfigKey<V> key, V value) {
config.configure(key, value);
return self();
}
@Override
public T configure(Map<?, ?> flags) {
if (flags!=null)
config.putAll(flags);
return self();
}
@Override
public T addCompletionListener(Function<ProcessTaskWrapper<?>, Void> listener) {
completionListeners.add(listener);
return self();
}
@Override
protected void finalize() throws Throwable {
// help let people know of API usage error
if (dirty)
log.warn("Task "+this+" was modified but modification was never used");
super.finalize();
}
}