--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * 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.appc.adapter.messaging.dmaap.http;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import java.io.IOException;
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import org.apache.http.HttpEntity;
+import org.apache.http.NameValuePair;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.utils.URIBuilder;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.util.EntityUtils;
+import org.json.JSONArray;
+import org.onap.appc.adapter.message.Consumer;
+
+public class HttpDmaapConsumerImpl extends CommonHttpClient implements Consumer {
+
+ private static final EELFLogger LOG = EELFManager.getInstance().getLogger(HttpDmaapConsumerImpl.class);
+
+ // Default values
+ private static final int DEFAULT_TIMEOUT_MS = 15000;
+ private static final int DEFAULT_LIMIT = 1000;
+ private static final String URL_TEMPLATE = "%s/events/%s/%s/%s";
+
+ private List<String> urls;
+ private String filter;
+
+ public HttpDmaapConsumerImpl(Collection<String> hosts, String topicName, String consumerName, String consumerId,
+ String filter) {
+
+ this(hosts, topicName, consumerName, consumerId, filter, null, null);
+ }
+
+ public HttpDmaapConsumerImpl(Collection<String> hosts, String topicName, String consumerName, String consumerId,
+ String filter, String user, String password) {
+
+ urls = new ArrayList<>();
+ for (String host : hosts) {
+ urls.add(String.format(URL_TEMPLATE, formatHostString(host), topicName, consumerName, consumerId));
+ }
+ this.filter = filter;
+ updateCredentials(user, password);
+ }
+
+ @Override
+ public void updateCredentials(String user, String pass) {
+ LOG.debug(String.format("Setting auth to %s for %s", user, this.toString()));
+ this.setBasicAuth(user, pass);
+ }
+
+ @Override
+ public List<String> fetch(int waitMs, int limit) {
+ LOG.debug(String.format("Fetching up to %d records with %dms wait on %s", limit, waitMs, this.toString()));
+ List<String> out = new ArrayList<>();
+ try {
+ List<NameValuePair> urlParams = new ArrayList<>();
+ urlParams.add(new BasicNameValuePair("timeout", String.valueOf(waitMs)));
+ urlParams.add(new BasicNameValuePair("limit", String.valueOf(limit)));
+ if (filter != null) {
+ urlParams.add(new BasicNameValuePair("filter", filter));
+ }
+
+ URIBuilder builder = new URIBuilder(urls.get(0));
+ builder.setParameters(urlParams);
+
+ URI uri = builder.build();
+ LOG.info(String.format("GET %s", uri));
+ HttpGet request = getReq(uri, waitMs);
+ CloseableHttpResponse response = getClient().execute(request);
+
+ int httpStatus = response.getStatusLine().getStatusCode();
+ HttpEntity entity = response.getEntity();
+ String body = (entity != null) ? entityToString(entity) : null;
+
+ LOG.debug(String.format("Request to %s completed with status %d and a body size of %s", uri, httpStatus,
+ body != null ? body.length() : "null"));
+
+ response.close();
+ if (httpStatus == 200 && body != null) {
+ JSONArray json = new JSONArray(body);
+ LOG.info(String.format("Got %d messages from DMaaP", json.length()));
+ for (int i = 0; i < json.length(); i++) {
+ out.add(json.getString(i));
+ }
+ } else {
+ LOG.error(String.format("Did not get 200 from DMaaP. Got %d - %s", httpStatus, body));
+ sleep(waitMs);
+ }
+ } catch (Exception e) {
+ if (urls.size() > 1) {
+ String failedUrl = urls.remove(0);
+ urls.add(failedUrl);
+ LOG.debug(String.format("Moving host %s to the end of the pool. New primary host is %s", failedUrl,
+ urls.get(0)));
+ }
+ LOG.error(String.format("Got exception while querying DMaaP. Message: %s", e.getMessage()), e);
+ sleep(waitMs);
+ }
+ return out;
+ }
+
+ @Override
+ public List<String> fetch() {
+ return fetch(DEFAULT_TIMEOUT_MS, DEFAULT_LIMIT);
+ }
+
+ @Override
+ public String toString() {
+ String hostStr = (urls == null || urls.isEmpty()) ? "N/A" : urls.get(0);
+ return String.format("Consumer listening to [%s]", hostStr);
+ }
+
+ String entityToString(HttpEntity entity) throws IOException {
+ return EntityUtils.toString(entity);
+ }
+
+ private void sleep(int ms) {
+ LOG.info(String.format("Sleeping for %ds after failed request", ms / 1000));
+ try {
+ Thread.sleep(ms);
+ } catch (InterruptedException e1) {
+ LOG.error("Interrupted while sleeping", e1);
+ Thread.currentThread().interrupt();
+ }
+ }
+
+}
Code Review / appc.git / blobdiff