| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.felix.shell.tui; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileReader; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| |
| import org.apache.felix.shell.ShellService; |
| import org.osgi.framework.BundleActivator; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceEvent; |
| import org.osgi.framework.ServiceListener; |
| import org.osgi.framework.ServiceReference; |
| |
| public class Activator implements BundleActivator { |
| |
| private static final String RUN_CMD = "run "; |
| |
| private BundleContext context; |
| private ShellTuiRunnable shellRunnable; |
| private Thread thread; |
| private ServiceListener listener; |
| private ServiceReference shellRef; |
| private ShellService shell; |
| |
| public void start(BundleContext bcontext) { |
| context = bcontext; |
| |
| // Listen for registering/unregistering impl service. |
| listener = new ShellServiceListener(); |
| try { |
| context.addServiceListener(listener, |
| "(objectClass=" + org.apache.felix.shell.ShellService.class.getName() + ")"); |
| } catch (InvalidSyntaxException ex) { |
| System.err.println("ShellTui: Cannot add service listener."); |
| System.err.println("ShellTui: " + ex); |
| } |
| |
| // Now try to manually initialize the impl service |
| // since one might already be available. |
| initializeService(); |
| |
| // Start impl thread. |
| shellRunnable = new ShellTuiRunnable(); |
| thread = new Thread(shellRunnable, "Felix Shell TUI"); |
| thread.start(); |
| } |
| |
| public void stop(BundleContext bcontext) { |
| if (shellRunnable != null) { |
| shellRunnable.stop(); |
| thread.interrupt(); |
| } |
| if (listener != null) { |
| context.removeServiceListener(listener); |
| } |
| uninitializeService(); |
| } |
| |
| private synchronized void initializeService() { |
| if (shell != null) { |
| return; |
| } |
| shellRef = context.getServiceReference(org.apache.felix.shell.ShellService.class.getName()); |
| if (shellRef == null) { |
| return; |
| } |
| shell = (ShellService)context.getService(shellRef); |
| } |
| |
| private synchronized void uninitializeService() { |
| if (shellRef != null) { |
| context.ungetService(shellRef); |
| } |
| shellRef = null; |
| shell = null; |
| } |
| |
| private class ShellServiceListener implements ServiceListener { |
| public void serviceChanged(ServiceEvent event) { |
| synchronized (Activator.this) { |
| if (event.getType() == ServiceEvent.REGISTERED) { |
| // Ignore additional services if we already have one. |
| if (shellRef == null) { |
| // Initialize the service if we don't have one. |
| initializeService(); |
| } |
| } else if (event.getType() == ServiceEvent.UNREGISTERING |
| && event.getServiceReference().equals(shellRef)) { |
| // Unget the service if it is unregistering. |
| uninitializeService(); |
| // Try to get another service. |
| initializeService(); |
| } |
| } |
| } |
| } |
| |
| private class ShellTuiRunnable implements Runnable { |
| |
| private volatile boolean stop; |
| |
| public void stop() { |
| stop = true; |
| } |
| |
| public void run() { |
| String line; |
| BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); |
| |
| while (!stop) { |
| System.out.print("-> "); |
| |
| try { |
| line = in.readLine(); |
| } catch (IOException ex) { |
| System.err.println("Could not read input, please try again."); |
| continue; |
| } |
| |
| synchronized (Activator.this) { |
| if (shell == null) { |
| System.out.println("No impl service available."); |
| continue; |
| } |
| |
| if (line == null) { |
| continue; |
| } |
| |
| line = line.trim(); |
| |
| if (line.isEmpty()) { |
| continue; |
| } |
| |
| try { |
| if (line.startsWith(RUN_CMD)) { |
| String path = line.substring(RUN_CMD.length()).trim(); |
| System.out.println("loading commands from: " + path); |
| File commands = new File(path); |
| if (commands.exists()) { |
| BufferedReader reader = new BufferedReader(new FileReader(commands)); |
| String command = reader.readLine().trim(); |
| while (command != null) { |
| if (!command.isEmpty()) { |
| System.out.println("\nexecuting: " + command); |
| shell.executeCommand(command.trim(), System.out, System.err); |
| } |
| command = reader.readLine(); |
| } |
| reader.close(); |
| } else { |
| System.err.println(path + " not found"); |
| } |
| } else { |
| shell.executeCommand(line, System.out, System.err); |
| } |
| } catch (Exception ex) { |
| System.err.println("ShellTui: " + ex); |
| ex.printStackTrace(); |
| } |
| } |
| } |
| } |
| } |
| } |