@Test(enabled = false)
public void testQuery() throws Exception {
URI location =
client.execute(
preparePost()
.setUri(uriFor("/v1/query"))
.setBodyGenerator(createStaticBodyGenerator("query", UTF_8))
.build(),
new CreatedResponseHandler());
assertQueryStatus(location, QueryState.RUNNING);
QueryInfo queryInfo =
client.execute(
prepareGet().setUri(location).build(),
createJsonResponseHandler(jsonCodec(QueryInfo.class)));
TaskInfo taskInfo = queryInfo.getOutputStage().getTasks().get(0);
URI outputLocation = uriFor("/v1/task/" + taskInfo.getTaskId() + "/results/out");
long sequenceId = 0;
PagesResponse response =
client.execute(
prepareGet()
.setUri(
uriBuilderFrom(outputLocation).appendPath(String.valueOf(sequenceId)).build())
.build(),
new PageResponseHandler());
List<Page> pages = response.getPages();
assertEquals(countPositions(pages), 220);
assertQueryStatus(location, QueryState.RUNNING);
sequenceId += pages.size();
response =
client.execute(
prepareGet()
.setUri(
uriBuilderFrom(outputLocation).appendPath(String.valueOf(sequenceId)).build())
.build(),
new PageResponseHandler());
pages = response.getPages();
assertEquals(countPositions(pages), 44 + 48);
sequenceId += pages.size();
response =
client.execute(
prepareGet()
.setUri(
uriBuilderFrom(outputLocation).appendPath(String.valueOf(sequenceId)).build())
.build(),
new PageResponseHandler());
pages = response.getPages();
assertEquals(countPositions(pages), 0);
assertQueryStatus(location, QueryState.FINISHED);
// cancel the query
StatusResponse cancelResponse =
client.execute(prepareDelete().setUri(location).build(), createStatusResponseHandler());
assertQueryStatus(location, QueryState.FINISHED);
assertEquals(cancelResponse.getStatusCode(), HttpStatus.NO_CONTENT.code());
}
@Override
public PagesResponse handle(Request request, Response response) {
// no content means no content was created within the wait period, but query is still ok
// if job is finished, complete is set in the response
if (response.getStatusCode() == HttpStatus.NO_CONTENT.code()) {
return createEmptyPagesResponse(
getTaskInstanceId(response),
getToken(response),
getNextToken(response),
getComplete(response));
}
// otherwise we must have gotten an OK response, everything else is considered fatal
if (response.getStatusCode() != HttpStatus.OK.code()) {
StringBuilder body = new StringBuilder();
try (BufferedReader reader =
new BufferedReader(new InputStreamReader(response.getInputStream()))) {
// Get up to 1000 lines for debugging
for (int i = 0; i < 1000; i++) {
String line = reader.readLine();
// Don't output more than 100KB
if (line == null || body.length() + line.length() > 100 * 1024) {
break;
}
body.append(line + "\n");
}
} catch (RuntimeException | IOException e) {
// Ignored. Just return whatever message we were able to decode
}
throw new PageTransportErrorException(
format(
"Expected response code to be 200, but was %s %s: %s%n%s",
response.getStatusCode(),
response.getStatusMessage(),
request.getUri(),
body.toString()));
}
// invalid content type can happen when an error page is returned, but is unlikely given the
// above 200
String contentType = response.getHeader(CONTENT_TYPE);
if (contentType == null) {
throw new PageTransportErrorException(
format("%s header is not set: %s %s", CONTENT_TYPE, request.getUri(), response));
}
if (!mediaTypeMatches(contentType, PRESTO_PAGES_TYPE)) {
throw new PageTransportErrorException(
format(
"Expected %s response from server but got %s: %s",
PRESTO_PAGES_TYPE, contentType, request.getUri()));
}
String taskInstanceId = getTaskInstanceId(response);
long token = getToken(response);
long nextToken = getNextToken(response);
boolean complete = getComplete(response);
try (SliceInput input = new InputStreamSliceInput(response.getInputStream())) {
List<Page> pages = ImmutableList.copyOf(readPages(blockEncodingSerde, input));
return createPagesResponse(taskInstanceId, token, nextToken, pages, complete);
} catch (IOException e) {
throw Throwables.propagate(e);
}
}