com.aspectran.undertow.daemon.command.UndertowCommand Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2024 The Aspectran Project
*
* 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.
*/
package com.aspectran.undertow.daemon.command;
import com.aspectran.core.activity.request.ParameterMap;
import com.aspectran.core.component.bean.BeanException;
import com.aspectran.core.component.bean.BeanRegistry;
import com.aspectran.core.context.expr.ItemEvaluation;
import com.aspectran.core.context.expr.ItemEvaluator;
import com.aspectran.core.context.rule.ItemRuleMap;
import com.aspectran.daemon.command.AbstractCommand;
import com.aspectran.daemon.command.CommandParameters;
import com.aspectran.daemon.command.CommandRegistry;
import com.aspectran.daemon.command.CommandResult;
import com.aspectran.undertow.server.TowServer;
import com.aspectran.utils.ExceptionUtils;
import com.aspectran.utils.StringUtils;
import com.aspectran.utils.annotation.jsr305.NonNull;
import com.aspectran.utils.lifecycle.LifeCycle;
import java.net.BindException;
/**
* Use the command 'undertow' to control the Undertow Server.
*/
public class UndertowCommand extends AbstractCommand {
private static final String NAMESPACE = "builtins";
private static final String COMMAND_NAME = "undertow";
private final CommandDescriptor descriptor = new CommandDescriptor();
public UndertowCommand(CommandRegistry registry) {
super(registry);
}
@Override
public CommandResult execute(CommandParameters parameters) {
try {
String mode = null;
String serverName = null;
ItemRuleMap parameterItemRuleMap = parameters.getParameterItemRuleMap();
if ((parameterItemRuleMap != null && !parameterItemRuleMap.isEmpty())) {
ItemEvaluator evaluator = new ItemEvaluation(getDaemonService().getDefaultActivity());
ParameterMap parameterMap = evaluator.evaluateAsParameterMap(parameterItemRuleMap);
mode = parameterMap.getParameter("mode");
serverName = parameterMap.getParameter("server");
}
if (mode == null) {
return failed("'mode' parameter is not specified");
}
if (!StringUtils.hasLength(serverName)) {
serverName = "tow.server";
}
switch (mode) {
case "start":
return startTowServer(serverName);
case "stop":
return stopTowServer(serverName);
case "restart":
CommandResult commandResult = stopTowServer(serverName);
if (commandResult.isSuccess()) {
commandResult = startTowServer(serverName);
}
return commandResult;
case "status":
return printServerStatus(serverName);
default:
return failed(error("Unknown mode '" + mode + "'"));
}
} catch (Exception e) {
return failed(e);
}
}
private CommandResult startTowServer(String serverName) throws Exception {
TowServer towServer = null;
try {
if (hasTowServer(serverName)) {
towServer = getTowServer(serverName);
if (towServer.isRunning()) {
return failed(warn("Undertow server is already running"));
} else {
towServer.start();
return success(info(getStatus(towServer.getState())));
}
} else {
towServer = getTowServer(serverName);
if (!towServer.isRunning()) {
towServer.start();
}
return success(info(getStatus(towServer.getState())));
}
} catch (Exception e) {
if (towServer != null) {
destroyTowServer(towServer);
}
Throwable cause = ExceptionUtils.getRootCause(e);
if (cause instanceof BindException) {
return failed("Undertow server failed to start. Cause: Port already in use", e);
} else {
return failed(e);
}
}
}
private CommandResult stopTowServer(String serverName) {
try {
if (hasTowServer(serverName)) {
TowServer towServer = getTowServer(serverName);
destroyTowServer(towServer);
return success(info(getStatus(LifeCycle.STOPPED)));
} else {
return failed(warn("Undertow server is not running"));
}
} catch (Exception e) {
return failed(e);
}
}
private CommandResult printServerStatus(String serverName) {
try {
if (hasTowServer(serverName)) {
TowServer towServer = getTowServer(serverName);
if (towServer.isStarted()) {
return success(info(getStatus(LifeCycle.RUNNING)));
} else {
return success(info(getStatus(towServer.getState())));
}
} else {
return success(info(getStatus(LifeCycle.STOPPED)));
}
} catch (BeanException e) {
return failed("Undertow server is not available", e);
} catch (Exception e) {
return failed(e);
}
}
@NonNull
private String getStatus(String status) {
return status + " - " + "Undertow " + TowServer.getVersion();
}
private TowServer getTowServer(String serverName) {
BeanRegistry beanRegistry = getDaemonService().getActivityContext().getBeanRegistry();
return beanRegistry.getBean(TowServer.class, serverName);
}
private boolean hasTowServer(String serverName) {
BeanRegistry beanRegistry = getDaemonService().getActivityContext().getBeanRegistry();
return beanRegistry.hasSingleton(TowServer.class, serverName);
}
private void destroyTowServer(TowServer towServer) throws Exception {
BeanRegistry beanRegistry = getDaemonService().getActivityContext().getBeanRegistry();
beanRegistry.destroySingleton(towServer);
}
@Override
public Descriptor getDescriptor() {
return descriptor;
}
private static class CommandDescriptor implements Descriptor {
@Override
public String getNamespace() {
return NAMESPACE;
}
@Override
public String getName() {
return COMMAND_NAME;
}
@Override
@NonNull
public String getDescription() {
return "Use the command 'undertow' to control the Undertow server";
}
}
}