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package com.sun.enterprise.ee.synchronization.processor;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.util.zip.CRC32;
import java.util.zip.ZipOutputStream;
import java.util.zip.CheckedOutputStream;
import com.sun.enterprise.ee.util.zip.Zipper;
import com.sun.enterprise.ee.synchronization.SynchronizationRequest;
import com.sun.enterprise.ee.synchronization.SynchronizationResponse;
import com.sun.enterprise.config.ConfigContext;
import com.sun.enterprise.config.serverbeans.ServerHelper;
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.ee.EELogDomains;
import com.sun.enterprise.util.i18n.StringManager;
import java.io.IOException;
import com.sun.enterprise.config.ConfigException;
/**
* Processor class that generates byte array as output.
*
* @author Nazrul Islam
* @since JDK 1.4
*/
public class ByteProcessor extends BaseProcessor {
/**
* Constructor.
*
* @param ctx request context
*
* @throws IOException if an i/o error
*/
public ByteProcessor(RequestContext ctx) throws IOException {
_ctx = ctx;
_bos = new ByteArrayOutputStream(BUFFER_SIZE);
_cos = new CheckedOutputStream(
new BufferedOutputStream(_bos), new CRC32());
_out = new ZipOutputStream(_cos);
}
/**
* Processes the always included application names and sets the max
* buffer size for the byte array.
*
* @param req synchronization request
* @param z zipper object
*
* @throws ConfigException if a configuration parsing error
*/
void initZipper(SynchronizationRequest req, Zipper z)
throws ConfigException {
//sets the max buffer size of bytes
long buffer = getMaxBuffer();
z.setMaxBuffer(buffer);
processAlwaysInclude(req, z);
}
/**
* Assembles the synchronization response.
*
* @param zipSize size from the zipper
* @param results processed synchronization requests
*
* @throws IOException if an i/o error
*/
void postProcess(long zipSize, SynchronizationRequest[] results)
throws IOException {
_cos.flush();
byte[] zipBytes = null;
// converts the byte array output stream
zipBytes = _bos.toByteArray();
if (zipBytes == null) {
zipBytes = new byte[0];
}
// checksum
long checksum = _cos.getChecksum().getValue();
// closes the streams
if (zipBytes.length > 0) {
_out.close();
_out = null;
}
// synchronization response
_response = new SynchronizationResponse(zipBytes, results,
checksum, _ctx.getStartTime(), System.currentTimeMillis());
}
/**
* Returns the max byte buffer size to be used in synchronization.
*/
private long getMaxBuffer() {
long maxBuffer = MAX_BUFFER_SIZE;
try {
// use buffer defined in DAS's system environment
String buffer = System.getProperty(MAX_BUFFER_PROP);
if ( (buffer != null) && (!"".equals(buffer)) ) {
maxBuffer = Long.parseLong(buffer);
} else {
/*
// compute based on number of servers in the domain
ConfigContext cCtx = _ctx.getConfigContext();
Object[] servers = ServerHelper.getServersInDomain(cCtx);
// 128m / num of servers
Double d = new Double (134217728 / servers.length);
maxBuffer = d.longValue();
*/
}
} catch (Exception e) {
maxBuffer = MAX_BUFFER_SIZE;
}
return maxBuffer;
}
}