/*
* Copyright 1999-2011 Alibaba Group.
*
* 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.alibaba.dubbo.remoting.telnet.support.command;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.extension.Activate;
import com.alibaba.dubbo.common.extension.ExtensionLoader;
import com.alibaba.dubbo.common.status.Status;
import com.alibaba.dubbo.common.status.StatusChecker;
import com.alibaba.dubbo.common.status.support.StatusUtils;
import com.alibaba.dubbo.remoting.Channel;
import com.alibaba.dubbo.remoting.telnet.TelnetHandler;
import com.alibaba.dubbo.remoting.telnet.support.Help;
import com.alibaba.dubbo.remoting.telnet.support.TelnetUtils;
/**
* StatusTelnetHandler
*
* @author william.liangf
*/
@Activate
@Help(parameter = "[-l]", summary = "Show status.", detail = "Show status.")
public class StatusTelnetHandler implements TelnetHandler {
private final ExtensionLoader<StatusChecker> extensionLoader = ExtensionLoader.getExtensionLoader(StatusChecker.class);
public String telnet(Channel channel, String message) {
if (message.equals("-l")) {
List<StatusChecker> checkers = extensionLoader.getActivateExtension(channel.getUrl(), "status");
String[] header = new String[] {"resource", "status", "message"};
List<List<String>> table = new ArrayList<List<String>>();
Map<String, Status> statuses = new HashMap<String, Status>();
if (checkers != null && checkers.size() > 0) {
for (StatusChecker checker : checkers) {
String name = extensionLoader.getExtensionName(checker);
Status stat;
try {
stat = checker.check();
} catch (Throwable t) {
stat = new Status(Status.Level.ERROR, t.getMessage());
}
statuses.put(name, stat);
if (stat.getLevel() != null && stat.getLevel() != Status.Level.UNKNOWN) {
List<String> row = new ArrayList<String>();
row.add(name);
row.add(String.valueOf(stat.getLevel()));
row.add(stat.getMessage() == null ? "" : stat.getMessage());
table.add(row);
}
}
}
Status stat= StatusUtils.getSummaryStatus(statuses);
List<String> row = new ArrayList<String>();
row.add("summary");
row.add(String.valueOf(stat.getLevel()));
row.add(stat.getMessage());
table.add(row);
return TelnetUtils.toTable(header, table);
} else if (message.length() > 0) {
return "Unsupported parameter " + message + " for status.";
}
String status = channel.getUrl().getParameter("status");
Map<String, Status> statuses = new HashMap<String, Status>();
if (status != null && status.length() > 0) {
String[] ss = Constants.COMMA_SPLIT_PATTERN.split(status);
for (String s : ss) {
StatusChecker handler = extensionLoader.getExtension(s);
Status stat;
try {
stat = handler.check();
} catch (Throwable t) {
stat = new Status(Status.Level.ERROR, t.getMessage());
}
statuses.put(s, stat);
}
}
Status stat= StatusUtils.getSummaryStatus(statuses);
return String.valueOf(stat.getLevel());
}
}