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122 lines (104 loc) · 3.46 KB
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/*
* Copyright 2011-2012 Paddy Byers
*
* 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 org.meshpoint.anode;
import java.io.IOException;
import android.content.Context;
/**
* Public API to obtain and manage Isolate instances of node.js
* @author paddy
*/
public class Runtime {
/**************************
* private state
**************************/
private static Runtime theRuntime;
private Context ctx;
/**************************
* public API
**************************/
/**
* Public factory method to initialise the runtime environment.
* @param ctx the Context associated with the invoking activity,
* used to locate the assets
* @throws InitialisationException if there was a problem initialising the Runtime
*/
public static synchronized void initRuntime(Context ctx, String[] argv) throws InitialisationException {
if(theRuntime == null) {
try {
theRuntime = new Runtime(ctx, argv);
} catch (IOException e) {
throw new InitialisationException(e); }
}
}
public static boolean isInitialised() {
return theRuntime != null;
}
public static Isolate createIsolate() throws IllegalStateException {
if(theRuntime == null) {
throw new IllegalStateException("Runtime has not beed initialised");
}
return new Isolate(theRuntime.ctx);
}
/**
* States
*/
public static final int STATE_UNINITIALISED = 0;
public static final int STATE_CREATED = 1;
public static final int STATE_STARTED = 2;
public static final int STATE_STOPPING = 3;
public static final int STATE_STOPPED = 4;
/**
* Listener interface for being notified of state changes
*/
public interface StateListener {
public void stateChanged(int state);
}
/**
* Exception class signifying an initialisation problem with the
* framework, wrapping the underlying exception cause.
*/
public static class InitialisationException extends Exception {
private static final long serialVersionUID = 2496406014266651847L;
InitialisationException(Throwable cause) {super(cause);}
InitialisationException(String msg) {super(msg);}
}
/**
* Exception class signifying a lifecycle operation failed
* as a result of the runtime being in an inappropriate state.
*/
public static class IllegalStateException extends Exception {
private static final long serialVersionUID = -8553913470826899835L;
IllegalStateException(String msg) {super(msg);}
}
/**
* Exception class signifying an error in the node runtime,
* wrapping the indicated exit code.
*/
public static class NodeException extends Exception {
private static final long serialVersionUID = 5950820713527212317L;
NodeException(int exitval) {super("node exited with error code: " + exitval);}
}
/**************************
* private
**************************/
Runtime(Context ctx, String[] argv) throws IOException {
this.ctx = ctx;
RuntimeNative.init(ctx, argv);
}
public void finalize() {
RuntimeNative.nodeDispose();
}
}