/**
* Returns the current state of the execution.
*
* @return state of the execution, or <code>null</code> if the execution has not been started yet
* @throws OWSExceptionReport if the server replied with an exception
* @throws IOException if a communication/network problem occured
* @throws XMLStreamException
*/
public ExecutionState getState() throws OWSExceptionReport, IOException, XMLStreamException {
if (lastResponse == null) {
return null;
}
if (lastResponse.getStatus().getState() != ExecutionState.SUCCEEDED
&& lastResponse.getStatus().getState() != ExecutionState.FAILED) {
URL statusLocation = lastResponse.getStatusLocation();
if (statusLocation == null) {
throw new RuntimeException("Cannot update status. No statusLocation provided.");
}
LOG.debug("Polling response document from status location: " + statusLocation);
XMLInputFactory inFactory = XMLInputFactory.newInstance();
InputStream is = statusLocation.openStream();
XMLStreamReader xmlReader = inFactory.createXMLStreamReader(is);
XMLStreamUtils.nextElement(xmlReader);
if (OWSExceptionReader.isExceptionReport(xmlReader.getName())) {
throw OWSExceptionReader.parseExceptionReport(xmlReader);
}
ExecuteResponse100Reader reader = new ExecuteResponse100Reader(xmlReader);
lastResponse = reader.parse100();
}
return lastResponse.getStatus().getState();
}
private ExecutionResponse sendExecute(boolean async)
throws OWSExceptionReport, XMLStreamException, IOException {
responseFormat = new ResponseFormat(false, async, false, async, outputDefs);
// TODO what if server only supports Get?
URL url = client.getExecuteURL(true);
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
conn.setUseCaches(false);
// TODO does this need configurability?
conn.setRequestProperty("Content-Type", "application/xml");
XMLOutputFactory outFactory = XMLOutputFactory.newInstance();
OutputStream os = conn.getOutputStream();
XMLInputFactory inFactory = XMLInputFactory.newInstance();
if (LOG.isDebugEnabled()) {
File logFile = File.createTempFile("wpsclient", "request.xml");
XMLStreamWriter logWriter =
outFactory.createXMLStreamWriter(new FileOutputStream(logFile), "UTF-8");
ExecuteRequest100Writer executer = new ExecuteRequest100Writer(logWriter);
executer.write100(process.getId(), inputs, responseFormat);
logWriter.close();
LOG.debug("WPS request can be found at " + logFile);
InputStream is = new FileInputStream(logFile);
byte[] buffer = new byte[1024];
int read = 0;
while ((read = is.read(buffer)) != -1) {
os.write(buffer, 0, read);
}
is.close();
os.close();
} else {
XMLStreamWriter writer = outFactory.createXMLStreamWriter(os, "UTF-8");
ExecuteRequest100Writer executer = new ExecuteRequest100Writer(writer);
executer.write100(process.getId(), inputs, responseFormat);
writer.close();
}
InputStream responseStream = conn.getInputStream();
if (LOG.isDebugEnabled()) {
File logFile = File.createTempFile("wpsclient", "response");
OutputStream logStream = new FileOutputStream(logFile);
byte[] buffer = new byte[1024];
int read = 0;
while ((read = responseStream.read(buffer)) != -1) {
logStream.write(buffer, 0, read);
}
logStream.close();
responseStream = new FileInputStream(logFile);
LOG.debug("WPS response can be found at " + logFile);
}
// String outputContent = conn.getContentType();
// TODO determine XML reader encoding based on mime type
XMLStreamReader reader = inFactory.createXMLStreamReader(responseStream);
XMLStreamUtils.nextElement(reader);
if (OWSExceptionReader.isExceptionReport(reader.getName())) {
throw OWSExceptionReader.parseExceptionReport(reader);
}
if (new QName(WPSConstants.WPS_100_NS, "ExecuteResponse").equals(reader.getName())) {
ExecuteResponse100Reader responseReader = new ExecuteResponse100Reader(reader);
lastResponse = responseReader.parse100();
reader.close();
} else {
throw new RuntimeException(
"Unexpected Execute response: root element is '" + reader.getName() + "'");
}
return lastResponse;
}