diff options
author | 2017-12-14 08:59:26 -0600 | |
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committer | 2017-12-14 14:58:16 -0600 | |
commit | c8e0ec698ab687e81654b7cde3ce9ae4118de87e (patch) | |
tree | fc4f437523ecefc8fe961328f978c102964f2867 /feature-simulators/src/main/java/org | |
parent | 4884099eff44975eee57e6748823ff73f965e332 (diff) |
Add a DMaaP simulator
Added a DMaaP simulator for testing applications. One current
limitation is that the simulator does not support multiple "subscribers"
on the same topic; if someone gets a message, that message cannot be
subsequently retrieved by anyone else. The simulator has also not been
tested for concurrent getting and posting.
Also added a way to set the response code DMaaP would return for a get
to test that policy can gracefully handle errors.
It may need some work to become truely its own "feature"
Issue-ID: POLICY-489
Change-Id: I524981bdf5e4e825f13e6197dda11d9498e4f4bf
Signed-off-by: Charles Cole <cc847m@att.com>
Diffstat (limited to 'feature-simulators/src/main/java/org')
-rw-r--r-- | feature-simulators/src/main/java/org/onap/policy/drools/simulators/DMaaPSimulatorJaxRs.java | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/feature-simulators/src/main/java/org/onap/policy/drools/simulators/DMaaPSimulatorJaxRs.java b/feature-simulators/src/main/java/org/onap/policy/drools/simulators/DMaaPSimulatorJaxRs.java new file mode 100644 index 00000000..bdabc6ee --- /dev/null +++ b/feature-simulators/src/main/java/org/onap/policy/drools/simulators/DMaaPSimulatorJaxRs.java @@ -0,0 +1,123 @@ +/*- + * ============LICENSE_START======================================================= + * feature-simulators + * ================================================================================ + * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.drools.simulators; + +import java.io.IOException; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.LinkedBlockingQueue; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.BlockingQueue; + +import javax.servlet.http.HttpServletResponse; +import javax.ws.rs.Consumes; +import javax.ws.rs.DefaultValue; +import javax.ws.rs.GET; +import javax.ws.rs.POST; +import javax.ws.rs.Path; +import javax.ws.rs.PathParam; +import javax.ws.rs.QueryParam; +import javax.ws.rs.core.Context; +import javax.ws.rs.core.MediaType; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@Path("/events") +public class DMaaPSimulatorJaxRs { + + private static final Map<String, BlockingQueue<String>> queues = new ConcurrentHashMap<>(); + private static final Logger logger = LoggerFactory.getLogger(DMaaPSimulatorJaxRs.class); + private static int responseCode = 200; + + @GET + @Path("/{topicName}/{consumeGroup}/{consumerId}") + public String subscribe(@DefaultValue("0") @QueryParam("timeout") int timeout, @PathParam("topicName") String topicName, + @Context final HttpServletResponse httpResponse) { + int currentRespCode = responseCode; + httpResponse.setStatus(currentRespCode); + try { + httpResponse.flushBuffer(); + } catch (IOException e) { + final Logger logger = LoggerFactory.getLogger(DMaaPSimulatorJaxRs.class); + logger.error("flushBuffer threw: ", e); + return "Got an error"; + } + + if (currentRespCode < 200 || currentRespCode >= 300) + { + return "You got response code: " + currentRespCode; + } + if (queues.containsKey(topicName)) { + BlockingQueue<String> queue = queues.get(topicName); + String response = "No Data"; + try { + response = queue.poll(timeout, TimeUnit.MILLISECONDS); + } catch (InterruptedException e) { + logger.debug("error in DMaaP simulator", e); + } + if (response == null) { + response = "No Data"; + } + return response; + } + else if (timeout > 0) { + try { + Thread.sleep(timeout); + if (queues.containsKey(topicName)) { + BlockingQueue<String> queue = queues.get(topicName); + String response = queue.poll(); + if (response == null) { + response = "No Data"; + } + return response; + } + } catch (InterruptedException e) { + logger.debug("error in DMaaP simulator", e); + } + } + return "No topic"; + } + + @POST + @Path("/{topicName}") + @Consumes(MediaType.TEXT_PLAIN) + public String publish(@PathParam("topicName") String topicName, String body) { + if (queues.containsKey(topicName)) { + BlockingQueue<String> queue = queues.get(topicName); + queue.offer(body); + } + else { + BlockingQueue<String> queue = new LinkedBlockingQueue<>(); + queue.offer(body); + queues.put(topicName, queue); + } + + return ""; + } + + @POST + @Path("/setStatus") + public String setStatus(@QueryParam("statusCode") int statusCode) { + responseCode = statusCode; + return "Status code set"; + } +} |