/**
* Launches a clustered and load-balanced set of web servers. Demonstrates syntax, so many of the
* options used here are the defaults. (So the class could be much simpler, as in
* WebClusterExampleAlt.)
*
* <p>Requires: -Xmx512m -Xms128m -XX:MaxPermSize=256m and brooklyn-all jar, and this jar or classes
* dir, on classpath.
*/
public class WebClusterExample extends ApplicationBuilder {
public static final Logger LOG = LoggerFactory.getLogger(WebClusterExample.class);
static BrooklynProperties config = BrooklynProperties.Factory.newDefault();
public static final String DEFAULT_LOCATION = "localhost";
public static final String WAR_PATH = "classpath://hello-world-webapp.war";
private NginxController nginxController;
private ControlledDynamicWebAppCluster web;
protected void doBuild() {
nginxController =
createChild(
BasicEntitySpec.newInstance(NginxController.class)
// .configure("domain", "webclusterexample.brooklyn.local")
.configure("port", "8000+"));
web =
createChild(
ControlledDynamicWebAppCluster.Spec.newInstance()
.displayName("WebApp cluster")
.controller(nginxController)
.initialSize(1)
.memberSpec(
BasicEntitySpec.newInstance(JBoss7Server.class)
.configure("httpPort", "8080+")
.configure("war", WAR_PATH)));
web.getCluster()
.addPolicy(
AutoScalerPolicy.builder()
.metric(DynamicWebAppCluster.AVERAGE_REQUESTS_PER_SECOND)
.sizeRange(1, 5)
.metricRange(10, 100)
.build());
}
public static void main(String[] argv) {
List<String> args = Lists.newArrayList(argv);
String port = CommandLineUtil.getCommandLineOption(args, "--port", "8081+");
String location = CommandLineUtil.getCommandLineOption(args, "--location", DEFAULT_LOCATION);
// TODO Want to parse, to handle multiple locations
BrooklynLauncherCli launcher =
BrooklynLauncherCli.newInstance()
.application(new WebClusterExample().appDisplayName("Brooklyn WebApp Cluster example"))
.webconsolePort(port)
.location(location)
.start();
Entities.dumpInfo(launcher.getApplications());
}
}
/**
* Usual constructor, takes a set of properties; also (experimental) permits defining a
* brooklynProperties source
*/
public AbstractApplication(Map properties) {
super(properties);
if (properties.containsKey("mgmt")) {
mgmt = (ManagementContext) properties.remove("mgmt");
}
// TODO decide whether this is the best way to inject properties like this
Object propsSource = null;
if (properties.containsKey("brooklynProperties")) {
propsSource = properties.remove("brooklynProperties");
} else if (properties.containsKey("brooklyn.properties")) {
propsSource = properties.remove("brooklyn.properties");
}
if (propsSource instanceof String) {
Properties p = new Properties();
try {
p.load(new ResourceUtils(this).getResourceFromUrl((String) propsSource));
} catch (IOException e) {
throw new IllegalArgumentException(
"Invalid brooklyn properties source " + propsSource + ": " + e, e);
}
propsSource = p;
}
if (propsSource instanceof BrooklynProperties) {
brooklynProperties = (BrooklynProperties) propsSource;
} else if (propsSource instanceof Map) {
brooklynProperties = BrooklynProperties.Factory.newEmpty().addFromMap((Map) propsSource);
} else {
if (propsSource != null)
throw new IllegalArgumentException("Invalid brooklyn properties source " + propsSource);
brooklynProperties = BrooklynProperties.Factory.newDefault();
}
setAttribute(SERVICE_UP, false);
setAttribute(Attributes.SERVICE_STATE, Lifecycle.CREATED);
}
public Builder useDefaultProperties() {
properties = BrooklynProperties.Factory.newDefault();
return this;
}
private static JcloudsLocation resolve(String spec) {
BrooklynProperties brooklynProperties = BrooklynProperties.Factory.newDefault();
return (JcloudsLocation)
new LocationRegistry(brooklynProperties).resolve(JcloudsResolver.JCLOUDS + ":" + spec);
}