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/*-
* ============LICENSE_START=======================================================
* openECOMP : SDN-C
* ================================================================================
* Copyright (C) 2017 - 2018 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.ccsdk.sli.northbound.dmaapclient;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.HttpURLConnection;
/*
* java.net based client to build message router consumers
*/
public class MessageRouterHttpClientJdk implements SdncDmaapConsumer {
private static final Logger Log = LoggerFactory.getLogger(MessageRouterHttpClientJdk.class);
protected Boolean isReady = false;
protected Boolean isRunning = false;
protected URL url;
protected Integer fetchPause;
protected Properties properties;
protected final String DEFAULT_CONNECT_TIMEOUT = "30000";
protected final String DEFAULT_READ_TIMEOUT = "180000";
protected final String DEFAULT_TIMEOUT_QUERY_PARAM_VALUE = "15000";
protected final String DEFAULT_LIMIT = null;
private String authorizationString;
protected Integer connectTimeout;
protected Integer readTimeout;
protected String topic;
public MessageRouterHttpClientJdk() {}
@Override
public void run() {
if (isReady) {
isRunning = true;
while (isRunning) {
HttpURLConnection httpUrlConnection = null;
try {
httpUrlConnection = (HttpURLConnection) url.openConnection();
if (authorizationString != null) {
httpUrlConnection.addRequestProperty("Authorization", authorizationString);
}
httpUrlConnection.setRequestMethod("GET");
httpUrlConnection.setRequestProperty("Accept", "application/json");
httpUrlConnection.setUseCaches(false);
httpUrlConnection.setConnectTimeout(connectTimeout);
httpUrlConnection.setReadTimeout(readTimeout);
httpUrlConnection.connect();
int status = httpUrlConnection.getResponseCode();
Log.info("GET " + url + " returned http status " + status);
if (status < 300) {
BufferedReader br =
new BufferedReader(new InputStreamReader(httpUrlConnection.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line + "\n");
}
br.close();
String responseBody = sb.toString();
if (responseBody.contains("{")) {
// Get rid of opening [" entity =
responseBody = responseBody.substring(2);
// Get rid of closing "]
responseBody = responseBody.substring(0, responseBody.length() - 2);
// Split the json array into individual elements to process
for (String message : responseBody.split("\",\"")) {
// unescape the json
message = message.replace("\\\"", "\"");
// Topic names cannot contain periods
processMsg(message);
}
} else {
Log.info("Entity doesn't appear to contain JSON elements, logging body");
Log.info(responseBody);
}
}
} catch (Exception e) {
Log.error("GET " + url + " failed.", e);
} finally {
if (httpUrlConnection != null) {
httpUrlConnection.disconnect();
}
Log.info("Pausing " + fetchPause + " milliseconds before fetching from " + url + " again.");
try {
Thread.sleep(fetchPause);
} catch (InterruptedException e) {
Log.error("Could not sleep thread", e);
}
}
}
}
}
@Override
public void init(Properties baseProperties, String consumerPropertiesPath) {
try {
baseProperties.load(new FileInputStream(new File(consumerPropertiesPath)));
this.properties = baseProperties;
String username = properties.getProperty("username");
String password = properties.getProperty("password");
topic = properties.getProperty("topic");
String group = properties.getProperty("group");
String host = properties.getProperty("host");
String id = properties.getProperty("id");
String filter = properties.getProperty("filter");
if (filter != null) {
if (filter.length() > 0) {
try {
filter = URLEncoder.encode(filter, StandardCharsets.UTF_8.name());
} catch (UnsupportedEncodingException e) {
Log.error("Couldn't encode filter string", e);
}
} else {
filter = null;
}
}
String limitString = properties.getProperty("limit", DEFAULT_LIMIT);
Integer limit = null;
if (limitString != null && limitString.length() > 0) {
limit = Integer.valueOf(limitString);
}
Integer timeoutQueryParamValue =
Integer.valueOf(properties.getProperty("timeout", DEFAULT_TIMEOUT_QUERY_PARAM_VALUE));
connectTimeout = Integer.valueOf(properties.getProperty("connectTimeoutSeconds", DEFAULT_CONNECT_TIMEOUT));
readTimeout = Integer.valueOf(properties.getProperty("readTimeoutMinutes", DEFAULT_READ_TIMEOUT));
if (username != null && password != null && username.length() > 0 && password.length() > 0) {
authorizationString = buildAuthorizationString(username, password);
}
String urlString = buildlUrlString(topic, group, id, host, timeoutQueryParamValue, limit, filter);
this.url = new URL(urlString);
this.fetchPause = Integer.valueOf(properties.getProperty("fetchPause"));
this.isReady = true;
} catch (FileNotFoundException e) {
Log.error("FileNotFoundException while reading consumer properties", e);
} catch (IOException e) {
Log.error("IOException while reading consumer properties", e);
}
}
public void processMsg(String msg) {
Log.info(msg);
}
protected String buildAuthorizationString(String userName, String password) {
String basicAuthString = userName + ":" + password;
basicAuthString = Base64.getEncoder().encodeToString(basicAuthString.getBytes());
return "Basic " + basicAuthString;
}
protected String buildlUrlString(String topic, String consumerGroup, String consumerId, String host,
Integer timeout, Integer limit, String filter) {
StringBuilder sb = new StringBuilder();
sb.append("http://" + host + "/events/" + topic + "/" + consumerGroup + "/" + consumerId);
sb.append("?timeout=" + timeout);
if (limit != null) {
sb.append("&limit=" + limit);
}
if (filter != null) {
sb.append("&filter=" + filter);
}
return sb.toString();
}
@Override
public boolean isReady() {
return isReady;
}
@Override
public boolean isRunning() {
return isRunning;
}
}
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