/**
* 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.camel.component.mllp.impl;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.net.SocketException;
import org.apache.camel.component.mllp.MllpAcknowledgementDeliveryException;
import org.apache.camel.component.mllp.MllpException;
import org.apache.camel.component.mllp.MllpWriteException;
import static org.apache.camel.component.mllp.MllpEndpoint.END_OF_BLOCK;
import static org.apache.camel.component.mllp.MllpEndpoint.END_OF_DATA;
import static org.apache.camel.component.mllp.MllpEndpoint.START_OF_BLOCK;
public class MllpBufferedSocketWriter extends MllpSocketWriter {
static final int DEFAULT_SO_SNDBUF = 65535;
ByteArrayOutputStream outputBuffer;
public MllpBufferedSocketWriter(Socket socket, boolean acknowledgementWriter) {
super(socket, acknowledgementWriter);
try {
outputBuffer = new ByteArrayOutputStream(socket.getSendBufferSize());
} catch (SocketException socketEx) {
log.warn(String.format("Ignoring exception encountered retrieving SO_SNDBUF from the socket - using default size of %d bytes", DEFAULT_SO_SNDBUF), socketEx);
outputBuffer = new ByteArrayOutputStream(DEFAULT_SO_SNDBUF);
}
}
@Override
public void writeEnvelopedPayload(byte[] hl7MessageBytes, byte[] hl7AcknowledgementBytes) throws MllpException {
if (socket == null) {
final String errorMessage = "Socket is null";
if (isAcknowledgementWriter()) {
throw new MllpAcknowledgementDeliveryException(errorMessage, hl7MessageBytes, hl7AcknowledgementBytes);
} else {
throw new MllpWriteException(errorMessage, hl7MessageBytes);
}
} else if (!socket.isConnected()) {
final String errorMessage = "Socket is not connected";
if (isAcknowledgementWriter()) {
throw new MllpAcknowledgementDeliveryException(errorMessage, hl7MessageBytes, hl7AcknowledgementBytes);
} else {
throw new MllpWriteException(errorMessage, hl7MessageBytes);
}
} else if (socket.isClosed()) {
final String errorMessage = "Socket is closed";
if (isAcknowledgementWriter()) {
throw new MllpAcknowledgementDeliveryException(errorMessage, hl7MessageBytes, hl7AcknowledgementBytes);
} else {
throw new MllpWriteException(errorMessage, hl7MessageBytes);
}
}
OutputStream socketOutputStream = null;
try {
socketOutputStream = socket.getOutputStream();
} catch (IOException e) {
final String errorMessage = "Failed to retrieve the OutputStream from the Socket";
if (isAcknowledgementWriter()) {
throw new MllpAcknowledgementDeliveryException(errorMessage, hl7MessageBytes, hl7AcknowledgementBytes);
} else {
throw new MllpWriteException(errorMessage, hl7MessageBytes, hl7AcknowledgementBytes);
}
}
outputBuffer.write(START_OF_BLOCK);
if (isAcknowledgementWriter()) {
if (hl7AcknowledgementBytes == null) {
log.warn("HL7 Acknowledgement payload is null - sending empty MLLP payload");
} else if (hl7AcknowledgementBytes.length <= 0) {
log.warn("HL7 Acknowledgement payload is empty - sending empty MLLP payload");
} else {
outputBuffer.write(hl7AcknowledgementBytes, 0, hl7AcknowledgementBytes.length);
}
} else {
if (hl7MessageBytes == null) {
log.warn("HL7 Message payload is null - sending empty MLLP payload");
} else if (hl7MessageBytes.length <= 0) {
log.warn("HL7 Message payload is empty - sending empty MLLP payload");
} else {
outputBuffer.write(hl7MessageBytes, 0, hl7MessageBytes.length);
}
}
outputBuffer.write(END_OF_BLOCK);
outputBuffer.write(END_OF_DATA);
try {
outputBuffer.writeTo(socketOutputStream);
socketOutputStream.flush();
} catch (IOException e) {
final String errorMessage = "Failed to write the MLLP payload to the Socket's OutputStream";
if (isAcknowledgementWriter()) {
throw new MllpAcknowledgementDeliveryException(errorMessage, hl7MessageBytes, hl7AcknowledgementBytes);
} else {
throw new MllpWriteException(errorMessage, hl7MessageBytes);
}
} finally {
outputBuffer.reset();
}
}
}