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Stool's main component. Java Library, cli, setup code.
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/*
* Copyright 1&1 Internet AG, https://github.com/1and1/
*
* 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 net.oneandone.stool.templates;
import net.oneandone.stool.stage.Stage;
import net.oneandone.stool.util.Ports;
import javax.management.MBeanServerConnection;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeData;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;
public class StatusHelper {
private final Stage stage;
private final Stage.State state;
private final Ports ports;
public StatusHelper(Stage stage, Stage.State state, Ports ports) {
this.stage = stage;
this.state = state;
this.ports = ports;
}
public List ports() {
List map;
String url;
map = new ArrayList<>();
if (ports != null) {
map.add("debug port: " + ports.debug());
map.add("jmx port: " + ports.jmx());
url = stage.session.configuration.hostname + ":" + ports.jmx();
map.add(" jconsole " + url);
map.add(" jvisualvm --openjmx " + url);
}
return map;
}
public String heap() {
JMXServiceURL url;
MBeanServerConnection connection;
ObjectName name;
CompositeData result;
long used;
long max;
if (state != Stage.State.UP) {
return "";
}
if (ports == null) {
return "[missing jmx port]"; // I've seen this happen on ...
}
// see https://docs.oracle.com/javase/tutorial/jmx/remote/custom.html
try {
url = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://" + stage.session.configuration.hostname + ":" + ports.jmx() + "/jmxrmi");
} catch (MalformedURLException e) {
throw new IllegalStateException(e);
}
try {
connection = JMXConnectorFactory.connect(url, null).getMBeanServerConnection();
} catch (IOException e) {
e.printStackTrace(stage.session.console.verbose);
return "[cannot connect jmx server: " + e.getMessage() + "]";
}
try {
name = new ObjectName("java.lang:type=Memory");
} catch (MalformedObjectNameException e) {
throw new IllegalStateException(e);
}
try {
result = (CompositeData) connection.getAttribute(name, "HeapMemoryUsage");
} catch (Exception e) {
return "[cannot get jmx attribute: " + e.getMessage() + "]";
}
used = (Long) result.get("used");
max = (Long) result.get("max");
return Float.toString(((float) (used * 1000 / max)) / 10);
}
}