org.glassfish.embeddable.GlassFishRuntime Maven / Gradle / Ivy
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package org.glassfish.embeddable;
import org.glassfish.embeddable.spi.RuntimeBuilder;
import java.util.Iterator;
import java.util.ServiceConfigurationError;
import java.util.ServiceLoader;
/**
* This is the entry point API to bootstrap GlassFish.
*
* A GlassFishRuntime represents just the runtime environment,
* i.e., no active services yet. e.g., there won't be any web container
* started just by creating a GlassFishRuntime object.
*
* The services will be activated when GlassFish instance is
* started by doing omething like:
*
*
* GlassFishRuntime runtime = GlassFishRuntime.bootstrap(); // no active services
* GlassFish glassfish = runtime.newGlassFish();
* glassfish.start(); // active services.
*
* @author [email protected]
* @author [email protected]
*/
public abstract class GlassFishRuntime {
protected GlassFishRuntime() {
// Empty protected constructor so that it does not show up in the javadoc.
}
/**
* Bootstrap a GlassFishRuntime with default {@link BootstrapProperties}.
*
* @return Bootstrapped GlassFishRuntime
* @throws GlassFishException if the GlassFishRuntime is already bootstrapped.
*/
public static GlassFishRuntime bootstrap() throws GlassFishException {
return bootstrap(new BootstrapProperties(), GlassFishRuntime.class.getClassLoader());
}
/**
* Bootstrap GlassFish runtime based on runtime configuration passed in the bootstrapProperties object.
* This is a convenience method. Calling this method is same as
* calling {@link #bootstrap(BootstrapProperties , ClassLoader)} with null as second argument.
*
* @param bootstrapProperties BootstrapProperties used to setup the runtime
* @throws GlassFishException
*/
public static GlassFishRuntime bootstrap(BootstrapProperties bootstrapProperties) throws GlassFishException {
return bootstrap(bootstrapProperties, GlassFishRuntime.class.getClassLoader());
}
/**
* Bootstrap GlassFish runtime based on runtime configuration passed in the bootstrapProperties object.
* Calling this method twice will throw a GlassFishException
*
* @param bootstrapProperties BootstrapProperties used to setup the runtime
* @param cl ClassLoader used as parent loader by GlassFish modules. If null is passed, the class loader
* of this class is used.
* @return a bootstrapped runtime that can now be used to create new GlassFish instances
* @throws GlassFishException
*/
public static GlassFishRuntime bootstrap(BootstrapProperties bootstrapProperties, ClassLoader cl) throws GlassFishException {
return _bootstrap(bootstrapProperties, cl);
}
/**
* Shuts down the Runtime and dispose off all the GlassFish objects
* created via this Runtime
*
* @throws GlassFishException
*/
public abstract void shutdown() throws GlassFishException;
/**
* Create a new instance of GlassFish with default {@link org.glassfish.embeddable.GlassFishProperties}
*
* @return New GlassFish instance.
* @throws GlassFishException If at all fails to create a new GlassFish instance.
*/
public GlassFish newGlassFish() throws GlassFishException {
return newGlassFish(new GlassFishProperties());
}
/**
* Creates a new instance of GlassFish.
*
* @param glassfishProperties GlassFishProperties used to setup the GlassFish instance
* @return newly instantiated GlassFish object. It will be in {@link GlassFish.Status#INIT} state.
* @throws GlassFishException
*/
public abstract GlassFish newGlassFish(GlassFishProperties glassfishProperties) throws GlassFishException;
/*
* INTERNAL IMPLEMENTATION DETAILS
* Be careful while introducing dependencies in this class, as this is shipped as part of api jar used
* by users.
*/
/**
* Singleton
*/
private static GlassFishRuntime me;
private synchronized static GlassFishRuntime _bootstrap(BootstrapProperties bootstrapProperties, ClassLoader cl) throws GlassFishException {
if (me != null) {
throw new GlassFishException("Already bootstrapped", null);
}
RuntimeBuilder runtimeBuilder = getRuntimeBuilder(bootstrapProperties, cl != null ? cl : GlassFishRuntime.class.getClassLoader());
me = runtimeBuilder.build(bootstrapProperties);
return me;
}
protected synchronized static void shutdownInternal() throws GlassFishException {
if (me == null) {
throw new GlassFishException("Already shutdown", null);
}
me = null;
}
private static RuntimeBuilder getRuntimeBuilder(BootstrapProperties bootstrapProperties, ClassLoader cl) throws GlassFishException {
// StringBuilder sb = new StringBuilder("Launcher Class Loader = " + cl);
// if (cl instanceof URLClassLoader) {
// sb.append("has following Class Path: ");
// for (URL url : URLClassLoader.class.cast(cl).getURLs()) {
// sb.append(url).append(", ");
// }
// }
// System.out.println(sb);
Iterator runtimeBuilders = ServiceLoader.load(RuntimeBuilder.class, cl).iterator();
while (runtimeBuilders.hasNext()) {
try {
RuntimeBuilder builder = runtimeBuilders.next();
if (builder.handles(bootstrapProperties)) {
return builder;
}
} catch (ServiceConfigurationError sce) {
// Ignore the exception and move ahead to the next builder.
}
}
throw new GlassFishException("No runtime builder available for this configuration: " + bootstrapProperties.getProperties(), null);
}
}