private void onException(Throwable e, Response r, boolean mapped) {
if (request.isTracingEnabled()) {
Response.Status s = Response.Status.fromStatusCode(r.getStatus());
if (s != null) {
request.trace(
String.format(
"mapped exception to response: %s -> %d (%s)",
ReflectionHelper.objectToString(e), r.getStatus(), s.getReasonPhrase()));
} else {
request.trace(
String.format(
"mapped exception to response: %s -> %d",
ReflectionHelper.objectToString(e), r.getStatus()));
}
}
if (!mapped && r.getStatus() >= 500) {
logException(e, r, Level.SEVERE);
} else if (LOGGER.isLoggable(Level.FINE)) {
logException(e, r, Level.FINE);
}
setResponse(r);
this.mappedThrowable = e;
if (getEntity() != null && getHttpHeaders().getFirst(HttpHeaders.CONTENT_TYPE) == null) {
Object m = request.getProperties().get(HttpMethodRule.CONTENT_TYPE_PROPERTY);
if (m != null) {
request.getProperties().remove(HttpMethodRule.CONTENT_TYPE_PROPERTY);
getHttpHeaders().putSingle(HttpHeaders.CONTENT_TYPE, m);
}
}
}
/**
* Map an exception to a response.
*
* @param e the exception.
* @return true if the exception was mapped, otherwise false.
*/
public boolean mapException(Throwable e) {
ExceptionMapper em = wa.getExceptionMapperContext().find(e.getClass());
if (em == null) {
wa.getResponseListener().onError(Thread.currentThread().getId(), e);
return false;
}
wa.getResponseListener().onMappedException(Thread.currentThread().getId(), e, em);
if (request.isTracingEnabled()) {
request.trace(
String.format(
"matched exception mapper: %s -> %s",
ReflectionHelper.objectToString(e), ReflectionHelper.objectToString(em)));
}
try {
Response r = em.toResponse(e);
if (r == null) r = Response.noContent().build();
onException(e, r, true);
} catch (MappableContainerException ex) {
// If the exception mapper throws a MappableContainerException then
// rethrow it to the HTTP container
throw ex;
} catch (RuntimeException ex) {
LOGGER.severe(
"Exception mapper "
+ em
+ " for Throwable "
+ e
+ " threw a RuntimeException when "
+ "attempting to obtain the response");
Response r = Response.serverError().build();
onException(ex, r, false);
}
return true;
}
/**
* Write the response.
*
* <p>The status and headers will be written by calling the method {@link
* ContainerResponseWriter#writeStatusAndHeaders} on the provided {@link ContainerResponseWriter}
* instance. The {@link OutputStream} returned from that method call is used to write the entity
* (if any) to that {@link OutputStream}. An appropriate {@link MessageBodyWriter} will be found
* to write the entity.
*
* @throws WebApplicationException if {@link MessageBodyWriter} cannot be found for the entity
* with a 500 (Internal Server error) response.
* @throws java.io.IOException if there is an error writing the entity
*/
public void write() throws IOException {
if (isCommitted) return;
if (request.isTracingEnabled()) {
configureTrace(responseWriter);
}
if (entity == null) {
isCommitted = true;
responseWriter.writeStatusAndHeaders(-1, this);
responseWriter.finish();
return;
}
if (!getHttpHeaders().containsKey(HttpHeaders.VARY)) {
final String varyHeader = (String) request.getProperties().get(ContainerRequest.VARY_HEADER);
if (varyHeader != null) {
getHttpHeaders().add(HttpHeaders.VARY, varyHeader);
}
}
MediaType contentType = getMediaType();
if (contentType == null) {
contentType =
getMessageBodyWorkers()
.getMessageBodyWriterMediaType(
entity.getClass(), entityType, annotations, request.getAcceptableMediaTypes());
if (contentType == null || contentType.isWildcardType() || contentType.isWildcardSubtype())
contentType = MediaType.APPLICATION_OCTET_STREAM_TYPE;
getHttpHeaders().putSingle(HttpHeaders.CONTENT_TYPE, contentType);
}
final MessageBodyWriter p =
getMessageBodyWorkers()
.getMessageBodyWriter(entity.getClass(), entityType, annotations, contentType);
if (p == null) {
String message =
"A message body writer for Java class "
+ entity.getClass().getName()
+ ", and Java type "
+ entityType
+ ", and MIME media type "
+ contentType
+ " was not found";
LOGGER.severe(message);
Map<MediaType, List<MessageBodyWriter>> m = getMessageBodyWorkers().getWriters(contentType);
LOGGER.severe(
"The registered message body writers compatible with the MIME media type are:\n"
+ getMessageBodyWorkers().writersToString(m));
if (request.getMethod().equals("HEAD")) {
isCommitted = true;
responseWriter.writeStatusAndHeaders(-1, this);
responseWriter.finish();
return;
} else {
throw new WebApplicationException(new MessageException(message), 500);
}
}
final long size = p.getSize(entity, entity.getClass(), entityType, annotations, contentType);
if (request.getMethod().equals("HEAD")) {
if (size != -1) getHttpHeaders().putSingle(HttpHeaders.CONTENT_LENGTH, Long.toString(size));
isCommitted = true;
responseWriter.writeStatusAndHeaders(0, this);
} else {
if (request.isTracingEnabled()) {
request.trace(
String.format(
"matched message body writer: %s, \"%s\" -> %s",
ReflectionHelper.objectToString(entity),
contentType,
ReflectionHelper.objectToString(p)));
}
if (out == null) out = new CommittingOutputStream(size);
p.writeTo(
entity, entity.getClass(), entityType, annotations, contentType, getHttpHeaders(), out);
if (!isCommitted) {
isCommitted = true;
responseWriter.writeStatusAndHeaders(-1, this);
}
}
responseWriter.finish();
}