/**
* Replaces the payload format with property values from messageContext.
*
* @param format
* @param resultCTX
* @param synCtx
*/
private void replaceCTX(String format, StringBuffer resultCTX, MessageContext synCtx) {
Matcher ctxMatcher;
if (mediaType != null && (mediaType.equals(JSON_TYPE) || mediaType.equals(TEXT_TYPE))) {
ctxMatcher = ctxPattern.matcher(format);
} else {
ctxMatcher = ctxPattern.matcher("<pfPadding>" + format + "</pfPadding>");
}
while (ctxMatcher.find()) {
String ctxMatchSeq = ctxMatcher.group();
String expressionTxt = ctxMatchSeq.substring(5, ctxMatchSeq.length());
String replaceValue = synCtx.getProperty(expressionTxt).toString();
if (mediaType.equals(JSON_TYPE) && inferReplacementType(replaceValue).equals(XML_TYPE)) {
// XML to JSON conversion here
try {
replaceValue = "<jsonObject>" + replaceValue + "</jsonObject>";
OMElement omXML = AXIOMUtil.stringToOM(replaceValue);
replaceValue = JsonUtil.toJsonString(omXML).toString();
} catch (XMLStreamException e) {
handleException(
"Error parsing XML for JSON conversion, please check your property values return valid XML: ",
synCtx);
} catch (AxisFault e) {
handleException("Error converting XML to JSON", synCtx);
}
} else if (mediaType.equals(XML_TYPE)
&& inferReplacementType(replaceValue).equals(JSON_TYPE)) {
// JSON to XML conversion here
try {
OMElement omXML = JsonUtil.toXml(IOUtils.toInputStream(replaceValue), false);
if (JsonUtil.isAJsonPayloadElement(omXML)) { // remove <jsonObject/> from result.
Iterator children = omXML.getChildElements();
String childrenStr = "";
while (children.hasNext()) {
childrenStr += (children.next()).toString().trim();
}
replaceValue = childrenStr;
} else {
replaceValue = omXML.toString();
}
} catch (AxisFault e) {
handleException(
"Error converting JSON to XML, please check your property values return valid JSON: ",
synCtx);
}
}
ctxMatcher.appendReplacement(resultCTX, replaceValue);
}
ctxMatcher.appendTail(resultCTX);
}
/**
* Extract payload from the synapse message context.
*
* @param messageContext synapse message context
* @return payload
*/
public static String collectPayload(MessageContext messageContext) {
String payload = null;
try {
org.apache.axis2.context.MessageContext a2mc =
((Axis2MessageContext) messageContext).getAxis2MessageContext();
if (JsonUtil.hasAJsonPayload(a2mc)) {
payload = JsonUtil.jsonPayloadToString(a2mc);
} else {
payload = messageContext.getEnvelope().toString();
}
} catch (Exception e) {
// SOAP envelop is not created yet
payload = "NONE";
}
return payload;
}
private boolean mediate(MessageContext synCtx, String format) {
if (!isDoingXml(synCtx) && !isDoingJson(synCtx)) {
log.error(
"#mediate. Could not identify the payload format of the existing payload prior to mediate.");
return false;
}
org.apache.axis2.context.MessageContext axis2MessageContext =
((Axis2MessageContext) synCtx).getAxis2MessageContext();
StringBuffer result = new StringBuffer();
StringBuffer resultCTX = new StringBuffer();
regexTransformCTX(resultCTX, synCtx, format);
replace(resultCTX.toString(), result, synCtx);
String out = result.toString().trim();
if (log.isDebugEnabled()) {
log.debug("#mediate. Transformed payload format>>> " + out);
}
if (mediaType.equals(XML_TYPE)) {
try {
JsonUtil.removeJsonPayload(axis2MessageContext);
OMElement omXML = AXIOMUtil.stringToOM(out);
if (!checkAndReplaceEnvelope(
omXML,
synCtx)) { // check if the target of the PF 'format' is the entire SOAP envelop, not
// just the body.
axis2MessageContext.getEnvelope().getBody().addChild(omXML.getFirstElement());
}
} catch (XMLStreamException e) {
handleException("Error creating SOAP Envelope from source " + out, synCtx);
}
} else if (mediaType.equals(JSON_TYPE)) {
JsonUtil.newJsonPayload(axis2MessageContext, out, true, true);
} else if (mediaType.equals(TEXT_TYPE)) {
JsonUtil.removeJsonPayload(axis2MessageContext);
axis2MessageContext.getEnvelope().getBody().addChild(getTextElement(out));
}
// need to honour a content-type of the payload media-type as output from the payload
// {re-merging patch https://wso2.org/jira/browse/ESBJAVA-3014}
setContentType(synCtx);
return true;
}
public static org.apache.axis2.context.MessageContext attachMessage(
String jsonMessage, org.apache.axis2.context.MessageContext axis2Ctx) {
if (jsonMessage == null) {
log.error("Cannot attach null JSON string.");
return null;
}
AxisConfiguration axisConfig = axis2Ctx.getConfigurationContext().getAxisConfiguration();
if (axisConfig == null) {
log.warn("Cannot create AxisConfiguration. AxisConfiguration is null.");
return null;
}
try {
SOAPFactory soapFactory = new SOAP12Factory();
SOAPEnvelope envelope = soapFactory.createSOAPEnvelope();
envelope.addChild(JsonUtil.newJsonPayload(axis2Ctx, jsonMessage, true, true));
axis2Ctx.setEnvelope(envelope);
return axis2Ctx;
} catch (Exception e) {
log.error("Cannot attach message to Message Context. Error: " + e.getMessage(), e);
return null;
}
}
public boolean dispatch(MessageContext messageContext) {
if (log.isDebugEnabled()) {
log.debug(
"Sending the message to client with message processor ["
+ messageProcessor.getName()
+ "]");
}
// The below code is just for keeping the backward compatibility with the old code.
if (targetEndpoint == null) {
targetEndpoint =
(String) messageContext.getProperty(ForwardingProcessorConstants.TARGET_ENDPOINT);
}
MessageContext outCtx = null;
SOAPEnvelope originalEnvelop = messageContext.getEnvelope();
if (targetEndpoint != null) {
Endpoint ep = messageContext.getEndpoint(targetEndpoint);
try {
// Send message to the client
while (!isSuccessful && !isTerminated) {
try {
// For each retry we need to have a fresh copy of the actual message. otherwise retry
// may not
// work as expected.
messageContext.setEnvelope(MessageHelper.cloneSOAPEnvelope(originalEnvelop));
OMElement firstChild = null; //
org.apache.axis2.context.MessageContext origAxis2Ctx =
((Axis2MessageContext) messageContext).getAxis2MessageContext();
if (JsonUtil.hasAJsonPayload(origAxis2Ctx)) {
firstChild = origAxis2Ctx.getEnvelope().getBody().getFirstElement();
} // Had to do this because MessageHelper#cloneSOAPEnvelope does not clone
// OMSourcedElemImpl correctly.
if (JsonUtil.hasAJsonPayload(firstChild)) { //
OMElement clonedFirstElement =
messageContext.getEnvelope().getBody().getFirstElement();
if (clonedFirstElement != null) {
clonedFirstElement.detach();
messageContext.getEnvelope().getBody().addChild(firstChild);
}
} // Had to do this because MessageHelper#cloneSOAPEnvelope does not clone
// OMSourcedElemImpl correctly.
origAxis2Ctx.setProperty(
HTTPConstants.NON_ERROR_HTTP_STATUS_CODES, getNonRetryStatusCodes());
outCtx = sender.send(ep, messageContext);
isSuccessful = true;
} catch (Exception e) {
// this means send has failed due to some reason so we have to retry it
if (e instanceof SynapseException) {
isSuccessful = isNonRetryErrorCode(e.getCause().getMessage());
}
if (!isSuccessful) {
log.error(
"BlockingMessageSender of message processor ["
+ this.messageProcessor.getName()
+ "] failed to send message to the endpoint");
}
}
if (isSuccessful) {
if (outCtx != null) {
if ("true"
.equals(outCtx.getProperty(ForwardingProcessorConstants.BLOCKING_SENDER_ERROR))) {
// this means send has failed due to some reason so we have to retry it
isSuccessful =
isNonRetryErrorCode(
(String) outCtx.getProperty(SynapseConstants.ERROR_MESSAGE));
if (isSuccessful) {
sendThroughReplySeq(outCtx);
} else {
// This means some error has occurred so must try to send down the fault sequence.
log.error(
"BlockingMessageSender of message processor ["
+ this.messageProcessor.getName()
+ "] failed to send message to the endpoint");
sendThroughFaultSeq(outCtx);
}
} else {
// Send the message down the reply sequence if there is one
sendThroughReplySeq(outCtx);
messageConsumer.ack();
attemptCount = 0;
isSuccessful = true;
if (log.isDebugEnabled()) {
log.debug(
"Successfully sent the message to endpoint ["
+ ep.getName()
+ "]"
+ " with message processor ["
+ messageProcessor.getName()
+ "]");
}
}
} else {
// This Means we have invoked an out only operation
// remove the message and reset the count
messageConsumer.ack();
attemptCount = 0;
isSuccessful = true;
if (log.isDebugEnabled()) {
log.debug(
"Successfully sent the message to endpoint ["
+ ep.getName()
+ "]"
+ " with message processor ["
+ messageProcessor.getName()
+ "]");
}
}
}
if (!isSuccessful) {
// Then we have to retry sending the message to the client.
prepareToRetry();
} else {
if (messageProcessor.isPaused()) {
this.messageProcessor.resumeService();
log.info(
"Resuming the service of message processor [" + messageProcessor.getName() + "]");
}
}
}
} catch (Exception e) {
log.error(
"Message processor ["
+ messageProcessor.getName()
+ "] failed to send the message to"
+ " client",
e);
}
} else {
// No Target Endpoint defined for the Message
// So we do not have a place to deliver.
// Here we log a warning and remove the message
// todo: we can improve this by implementing a target inferring mechanism
log.warn(
"Property "
+ ForwardingProcessorConstants.TARGET_ENDPOINT
+ " not found in the message context , Hence removing the message ");
messageConsumer.ack();
}
return true;
}
private boolean isDoingJson(MessageContext messageContext) {
return JsonUtil.hasAJsonPayload(
((Axis2MessageContext) messageContext).getAxis2MessageContext());
}
/**
* Replaces the payload format with SynapsePath arguments which are evaluated using
* getArgValues().
*
* @param format
* @param result
* @param synCtx
*/
private void replace(String format, StringBuffer result, MessageContext synCtx) {
HashMap<String, String>[] argValues = getArgValues(synCtx);
HashMap<String, String> replacement;
Map.Entry<String, String> replacementEntry;
String replacementValue = null;
Matcher matcher;
matcher = pattern.matcher(format);
try {
while (matcher.find()) {
String matchSeq = matcher.group();
int argIndex;
try {
argIndex = Integer.parseInt(matchSeq.substring(1, matchSeq.length()));
} catch (NumberFormatException e) {
argIndex = Integer.parseInt(matchSeq.substring(2, matchSeq.length() - 1));
}
replacement = argValues[argIndex - 1];
replacementEntry = replacement.entrySet().iterator().next();
if (mediaType.equals(JSON_TYPE)
&& inferReplacementType(replacementEntry).equals(XML_TYPE)) {
// XML to JSON conversion here
try {
replacementValue = "<jsonObject>" + replacementEntry.getKey() + "</jsonObject>";
OMElement omXML = AXIOMUtil.stringToOM(replacementValue);
replacementValue =
JsonUtil.toJsonString(omXML)
.toString()
.replaceAll(
ESCAPE_DOUBLE_QUOTE_WITH_FIVE_BACK_SLASHES,
ESCAPE_DOUBLE_QUOTE_WITH_NINE_BACK_SLASHES)
.replaceAll(
ESCAPE_DOLLAR_WITH_TEN_BACK_SLASHES, ESCAPE_DOLLAR_WITH_SIX_BACK_SLASHES);
replacementValue = JsonUtil.toJsonString(omXML).toString();
} catch (XMLStreamException e) {
handleException(
"Error parsing XML for JSON conversion, please check your xPath expressions return valid XML: ",
synCtx);
} catch (AxisFault e) {
handleException("Error converting XML to JSON", synCtx);
}
} else if (mediaType.equals(XML_TYPE)
&& inferReplacementType(replacementEntry).equals(JSON_TYPE)) {
// JSON to XML conversion here
try {
OMElement omXML =
JsonUtil.toXml(IOUtils.toInputStream(replacementEntry.getKey()), false);
if (JsonUtil.isAJsonPayloadElement(omXML)) { // remove <jsonObject/> from result.
Iterator children = omXML.getChildElements();
String childrenStr = "";
while (children.hasNext()) {
childrenStr += (children.next()).toString().trim();
}
replacementValue = childrenStr;
} else { /// ~
replacementValue = omXML.toString();
}
// replacementValue = omXML.toString();
} catch (AxisFault e) {
handleException(
"Error converting JSON to XML, please check your JSON Path expressions return valid JSON: ",
synCtx);
}
} else {
// No conversion required, as path evaluates to regular String.
replacementValue = replacementEntry.getKey();
// This is to replace " with \" and \\ with \\\\
if (mediaType.equals(JSON_TYPE)
&& inferReplacementType(replacementEntry).equals(STRING_TYPE)
&& (!replacementValue.startsWith("{") && !replacementValue.startsWith("["))) {
replacementValue =
replacementValue
.replaceAll(
Matcher.quoteReplacement("\\\\"),
ESCAPE_BACK_SLASH_WITH_SIXTEEN_BACK_SLASHES)
.replaceAll("\"", ESCAPE_DOUBLE_QUOTE_WITH_TEN_BACK_SLASHES);
} else if ((mediaType.equals(JSON_TYPE)
&& inferReplacementType(replacementEntry).equals(JSON_TYPE))
&& (!replacementValue.startsWith("{") && !replacementValue.startsWith("["))) {
// This is to handle only the string value
replacementValue =
replacementValue.replaceAll("\"", ESCAPE_DOUBLE_QUOTE_WITH_TEN_BACK_SLASHES);
}
}
matcher.appendReplacement(result, replacementValue);
}
} catch (ArrayIndexOutOfBoundsException e) {
log.error("#replace. Mis-match detected between number of formatters and arguments", e);
}
matcher.appendTail(result);
}
