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package com.sun.messaging.jmq.jmsclient.protocol;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;
import com.sun.messaging.jmq.io.ReadWritePacket;
import com.sun.messaging.jmq.jmsclient.ConnectionHandler;
import com.sun.messaging.jmq.jmsclient.Debug;
public abstract class SocketConnectionHandler implements ConnectionHandler {
//default buffer size - String for use with system property.
private static String defaultBufferSize = "2048";
private boolean debug = Debug.debug;
private InputStream is = null;
private OutputStream os = null;
protected abstract void closeSocket() throws IOException ;
public boolean isDirectMode(){
return false;
}
public ReadWritePacket readPacket () throws IOException {
ReadWritePacket pkt = new ReadWritePacket();
pkt.readPacket(is);
return pkt;
}
public void writePacket (ReadWritePacket pkt) throws IOException {
pkt.writePacket(os);
}
public void configure(Properties configuration) throws IOException {
//for output stream
String prop = getProperty(configuration,"imqOutputBuffer", "true");
if (prop.equals("true")) {
String bufsize = getProperty(configuration,"imqOutputBufferSize", defaultBufferSize);
int outSize = Integer.parseInt(bufsize);
os = new BufferedOutputStream (getOutputStream(), outSize);
if (debug) {
Debug.println("buffered output stream, buffer size: " + outSize);
}
} else {
os = getOutputStream();
}
//for input stream
prop = getProperty(configuration,"imqInputBuffer", "true");
if (prop.equals("true")) {
String bufsize = getProperty(configuration,"imqInputBufferSize",
"2048");
int inSize = Integer.parseInt(bufsize);
is = new BufferedInputStream (getInputStream(), inSize);
if (debug) {
Debug.println("buffered input stream, buffer size: " + inSize);
}
} else {
is = getInputStream();
}
}
/**
* Returns a configuration property.
* Uses a System property if non-existant and a default if
* the System property doesn't exist.
*
* @param propname The key with which to retreive the property value.
* @param propdefault The default value to be returned.
*
* @return The property value of the property key <code>propname</code>
* If the key <code>propname</code> does not exist, then if a System
* property named <code>propname</code> exists, return that, otherwise
* return the value <code>propdefault</code>.
*/
private String getProperty(Properties configuration, String propname, String propdefault) {
String propval = (String)configuration.get(propname);
if (propval == null) {
propval = System.getProperty(propname) ;
}
return (propval == null ? propdefault : propval);
}
public void close() throws IOException {
getInputStream().close();
is.close();
os.close();
closeSocket();
}
}