Android Open Source - anode Runtime

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2011-2012 Paddy Byers//from w w  w .  j a v a  2 s .  co m
 *
 *   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;
    public 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();
  }
}

Java Source Code List

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