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package org.onap.ccsdk.sli.adaptors.messagerouter.publisher.provider.impl;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.SocketException;
import java.net.URL;
import java.util.Base64;
import org.onap.ccsdk.sli.adaptors.messagerouter.publisher.api.PublisherApi;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class PublisherApiImpl implements PublisherApi {
private static final Logger logger = LoggerFactory.getLogger(PublisherApiImpl.class);
protected final Integer DEFAULT_CONNECT_TIMEOUT = 30000; // will be treated as 30 seconds
protected final Integer DEFAULT_READ_TIMEOUT = 180000; // will be treated as 3 minutes
private String authorizationString;
protected Integer connectTimeout;
protected Integer readTimeout;
protected String baseUrl;
protected String username;
protected String[] hosts;
private String password;
public void setUsername(String username) {
this.username = username;
setAuthorizationString();
}
public void setPassword(String password) {
this.password = password;
setAuthorizationString();
}
public void setHost(String hostString) {
// a comma separated list of hosts can be passed in or a single host may be used
if (!hostString.contains(",")) {
this.hosts = new String[] { hostString };
} else {
this.hosts = hostString.split(",");
}
}
public PublisherApiImpl() {
connectTimeout = DEFAULT_CONNECT_TIMEOUT;
readTimeout = DEFAULT_READ_TIMEOUT;
}
public void init() {
setAuthorizationString();
}
protected String buildUrlString(Integer hostIndex, String topic) {
return hosts[hostIndex] + "/events/" + topic;
}
protected void configureHttpURLConnection(HttpURLConnection httpUrlConnection) {
httpUrlConnection.setRequestProperty("Content-Type", "application/json");
}
public Boolean publish(String topic, String body) {
for (int hostIndex = 0; hostIndex < hosts.length; hostIndex++) {
HttpURLConnection httpUrlConnection = null;
URL url = null;
try {
url = new URL(buildUrlString(hostIndex, topic));
logger.info("Publishing body to topic {} using the url {}", topic, url);
logger.info("Message to publish is\n{}", body);
httpUrlConnection = buildHttpURLConnection(url);
httpUrlConnection.setDoInput(true);
httpUrlConnection.setDoOutput(true);
httpUrlConnection.setUseCaches(false);
httpUrlConnection.setRequestMethod("POST");
// Write message
httpUrlConnection.setRequestProperty("Content-Length", Integer.toString(body.length()));
DataOutputStream outStr = new DataOutputStream(httpUrlConnection.getOutputStream());
outStr.write(body.getBytes());
outStr.close();
int status = httpUrlConnection.getResponseCode();
logger.info("Publishing body for topic {} using url {} returned status {}.", topic, url, status);
if (status < 300) {
String responseFromDMaaP = readFromStream(httpUrlConnection.getInputStream());
logger.info("Message router response is\n{}", responseFromDMaaP);
return true;
} else {
if (httpUrlConnection.getErrorStream() != null) {
String responseFromDMaaP = readFromStream(httpUrlConnection.getErrorStream());
logger.warn("Publishing body for topic {} using url {} failed." + " Error message is\n{}",
topic, url, responseFromDMaaP);
}
return false;
}
} catch (SocketException socketException) {
logger.error("SocketException was thrown during publishing message to DMaaP on url {}.", url,
socketException);
if (hostIndex < hosts.length) {
logger.info("Message sent to {} failed with a SocketException, but will be tried on {}",
hosts[hostIndex], hosts[hostIndex + 1]);
}
} catch (Exception e) {
logger.warn("Exception was thrown during publishing message to DMaaP on url {}.", url, e);
return false;
} finally {
if (httpUrlConnection != null) {
httpUrlConnection.disconnect();
}
}
}
return false;
}
protected void setAuthorizationString() {
String str = buildAuthorizationString(this.username, this.password);
this.authorizationString = str;
//System.out.println(this.authorizationString);
}
protected String buildAuthorizationString(String username, String password) {
String basicAuthString = username + ":" + password;
basicAuthString = Base64.getEncoder().encodeToString(basicAuthString.getBytes());
return "Basic " + basicAuthString;
}
protected HttpURLConnection buildHttpURLConnection(URL url) throws IOException {
HttpURLConnection httpUrlConnection = (HttpURLConnection) url.openConnection();
if (authorizationString != null) {
System.out.println(authorizationString);
httpUrlConnection.setRequestProperty("Authorization", authorizationString);
}
httpUrlConnection.setRequestProperty("Accept", "application/json");
httpUrlConnection.setUseCaches(false);
httpUrlConnection.setConnectTimeout(connectTimeout);
httpUrlConnection.setReadTimeout(readTimeout);
configureHttpURLConnection(httpUrlConnection);
return httpUrlConnection;
}
protected String readFromStream(InputStream stream) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(stream));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line);
}
br.close();
return sb.toString();
}
}
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