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DaemonAdmin.java
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package act.app;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* Licensed 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.
* #L%
*/
import act.cli.CliContext;
import act.cli.Command;
import act.cli.Required;
import act.data.JodaDateTimeCodec;
import act.util.PropertySpec;
import org.joda.time.DateTime;
import org.osgl.inject.annotation.Provided;
import org.osgl.util.E;
import java.util.Map;
/**
* Access application daemon status
*/
@SuppressWarnings("unused")
public class DaemonAdmin {
@Command(name = "act.daemon.list", help = "List app daemons")
@PropertySpec("id,state")
public Iterable<Daemon> list() {
return App.instance().registeredDaemons();
}
@Command(name = "act.daemon.start", help = "Start app daemon")
public void start(
@Required("specify daemon id") String id,
CliContext context
) {
Daemon daemon = get(id, context);
daemon.start();
report(daemon, context);
}
@Command(name = "act.daemon.stop", help = "Stop app daemon")
public void stop(
@Required("specify daemon id") String id,
CliContext context
) {
Daemon daemon = get(id, context);
daemon.stop();
report(daemon, context);
}
@Command(name = "act.daemon.restart", help = "Re-Start app daemon")
public void restart(
@Required("specify daemon id") String id,
CliContext context
) {
Daemon daemon = get(id, context);
daemon.restart();
report(daemon, context);
}
@Command(name = "act.daemon.status", help = "Report app daemon status")
public void status(
@Required("specify daemon id") String id,
CliContext context,
@Provided JodaDateTimeCodec fmt
) {
Daemon daemon = get(id, context);
Daemon.State state = daemon.state();
DateTime ts = daemon.timestamp();
Exception lastError = daemon.lastError();
context.println("Daemon[%s]: %s at %s", id, state, fmt.toString(ts));
if (null != lastError) {
DateTime errTs = daemon.errorTimestamp();
if (null != errTs) {
context.println("Last error: %s at %s", E.stackTrace(lastError), fmt.toString(errTs));
} else {
context.println("Last error: %s", E.stackTrace(lastError));
}
}
Map<String, Object> attributes = daemon.getAttributes();
if (!attributes.isEmpty()) {
context.println("Attributes: %s", attributes);
}
}
private static Daemon get(String id, CliContext context) {
Daemon daemon = App.instance().registeredDaemon(id);
if (null == daemon) {
context.println("Unknown daemon: %s", id);
return null;
}
return daemon;
}
private static void report(Daemon daemon, CliContext context) {
context.println("Daemon[%s]: %s", daemon.id(), daemon.state());
}
}