/*
* Copyright (c) 2003-2009, KNOPFLERFISH project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* - Neither the name of the KNOPFLERFISH project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.knopflerfish.bundle.consoletty;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.util.Dictionary;
import java.util.Hashtable;
import org.knopflerfish.service.console.ConsoleService;
import org.knopflerfish.service.console.Session;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceReference;
import org.osgi.service.cm.ManagedService;
import org.osgi.service.log.LogService;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;
// ******************** ConsoleTty ********************
/**
* Bundle activator implementation.
*
* @author Jan Stein
* @version $Revision: 1.1.1.1 $
*/
public class ConsoleTty
implements BundleActivator, ManagedService, ServiceTrackerCustomizer
{
final static private String logServiceName = LogService.class.getName();
final static private String consoleServiceName = ConsoleService.class
.getName();
final static private String NONBLOCKING = "nonblocking";
boolean nonblocking = false;
private ServiceTracker consoleTracker;
private Session consoleSession = null;
private BundleContext bc;
private Reader reader;
private PrintWriter writer;
/*---------------------------------------------------------------------------*
* BundleActivator implementation
*---------------------------------------------------------------------------*/
// ==================== start ====================
/**
* * Called by the framework when this bundle is started. * *
*
* @param bc
* Bundle context. *
* @exception BundleException
* shold be thrown when implemented
*/
public void start(BundleContext bc) throws Exception {
this.bc = bc;
log(LogService.LOG_INFO, "Starting");
// Get config
Hashtable p = new Hashtable();
p.put(Constants.SERVICE_PID, getClass().getName());
bc.registerService(ManagedService.class.getName(), this, p);
PrintStream out = null;
try {
ServiceReference[] srl = bc.getServiceReferences(PrintStream.class
.getName(), "(service.pid=java.lang.System.out)");
if (srl != null && srl.length == 1) {
out = (PrintStream) bc.getService(srl[0]);
}
} catch (Exception e) {
e.printStackTrace(System.out);
}
if (out == null) {
out = System.out;
}
reader = new InputStreamReader(new SystemIn(bc));
writer = new PrintWriter(out);
consoleTracker = new ServiceTracker(bc, consoleServiceName, this);
consoleTracker.open();
}
// ==================== stop ====================
/**
* Called by the framework when this bundle is stopped.
*
* @param bc Bundle context.
*/
public synchronized void stop(BundleContext bc) {
log(LogService.LOG_INFO, "Stopping");
consoleTracker.close();
try {
if (consoleSession != null) {
consoleSession.close();
}
} catch (Exception e) {
log(LogService.LOG_ERROR, "Failed to close session", e);
}
}
/*---------------------------------------------------------------------------*
* ManagedService implementation
*---------------------------------------------------------------------------*/
// ==================== updated ====================
/**
* Called by CM when it got this bundles configuration.
*
* @param cfg contains the new configuration properties.
*/
public synchronized void updated(Dictionary cfg)
throws IllegalArgumentException {
if (cfg != null) {
Boolean b = (Boolean) cfg.get(NONBLOCKING);
if (b != null) {
nonblocking = b.booleanValue();
}
} else {
nonblocking = false;
}
}
/*---------------------------------------------------------------------------*
* ServiceTrackerCustomizer implementation
*---------------------------------------------------------------------------*/
public Object addingService(ServiceReference reference) {
ConsoleService console = (ConsoleService) bc.getService(reference);
try {
consoleSession = console.runSession("console tty", reader, writer);
} catch (IOException ioe) {
log(LogService.LOG_ERROR,
"Failed to start console session, can not continue");
}
return console;
}
public void modifiedService(ServiceReference reference, Object service) {
}
public void removedService(ServiceReference reference, Object service) {
if (consoleSession != null) {
consoleSession.close();
consoleSession = null;
}
}
/*---------------------------------------------------------------------------*
* Protected utility methods
*---------------------------------------------------------------------------*/
// ==================== log ====================
/**
* Utility method used for logging.
*
* @param level Log level
* @param msg Log message
*/
public void log(int level, String msg) {
log(level, msg, null);
}
public void log(int level, String msg, Exception e) {
ServiceReference srLog = bc.getServiceReference(logServiceName);
if (srLog != null) {
LogService sLog = (LogService) bc.getService(srLog);
if (sLog != null) {
if (e == null) {
sLog.log(level, msg);
} else {
sLog.log(level, msg, e);
}
}
bc.ungetService(srLog);
}
}
/*
* ------------------------------------------------------------ Help class
* for VMs that when blocking in read() om System.in block other threads
* too. ------------------------------------------------------------
*/
class SystemIn extends InputStream {
InputStream in;
SystemIn(BundleContext bc) {
try {
ServiceReference[] srl = bc.getServiceReferences(
InputStream.class.getName(),
"(service.pid=java.lang.System.in)");
if (srl != null && srl.length == 1) {
in = (InputStream) bc.getService(srl[0]);
}
} catch (Exception e) {
e.printStackTrace(System.err);
}
if (in == null) {
in = System.in;
}
}
public void close() throws IOException {
in.close();
}
public int available() throws IOException {
return in.available();
}
public int read() throws IOException {
byte[] b = new byte[1];
if (read(b) == 1) {
return b[0];
}
return -1;
}
public int read(byte[] b) throws IOException {
return read(b, 0, b.length);
}
public int read(byte[] buf, int off, int len) throws IOException {
if (nonblocking) {
int nap = 50;
while (in.available() == 0) {
try {
Thread.sleep(nap);
} catch (InterruptedException e) {
}
nap = 200;
}
}
return in.read(buf, off, len);
}
}
}