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/*-
* ============LICENSE_START=======================================================
* org.onap.dcaegen2.collectors.restconf
* ================================================================================
* Copyright (C) 2018-2019 Huawei. 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.dcae.controller;
import org.glassfish.jersey.media.sse.EventSource;
import org.glassfish.jersey.media.sse.SseFeature;
import org.onap.dcae.common.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.HttpHeaders;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Base64;
import java.util.HashMap;
import java.util.Map;
import static org.onap.dcae.common.RestapiCallNodeUtil.*;
public class PersistentEventConnection implements Runnable {
private String event_name;
private String event_description;
private boolean event_sseventUrlEmbed;
private String event_sseventsField;
private String event_sseventsUrl;
private String event_subscriptionTemplate;
private String event_unSubscriptionTemplate;
private String event_ruleId;
private EventConnectionState state;
private volatile boolean running = true;
private static final Logger log = LoggerFactory.getLogger(PersistentEventConnection.class);
private RestConfContext ctx;
private AccessController parentCtrllr;
private Map<String, String> eventParaMap;
public PersistentEventConnection(String event_name,
String event_description,
boolean event_sseventUrlEmbed,
String event_sseventsField,
String event_sseventsUrl,
String event_subscriptionTemplate,
String event_unSubscriptionTemplate,
String event_ruleId,
AccessController parentCtrllr) {
this.event_name = event_name;
this.event_description = event_description;
this.event_sseventUrlEmbed = event_sseventUrlEmbed;
this.event_sseventsField = event_sseventsField;
this.event_sseventsUrl = event_sseventsUrl;
this.event_subscriptionTemplate = event_subscriptionTemplate;
this.event_unSubscriptionTemplate = event_unSubscriptionTemplate;
this.event_ruleId = event_ruleId;
this.state = EventConnectionState.INIT;
this.ctx = new RestConfContext();
for (String s : parentCtrllr.getCtx().getAttributeKeySet()) {
this.ctx.setAttribute(s, ctx.getAttribute(s));
}
this.parentCtrllr = parentCtrllr;
this.eventParaMap = new HashMap<>();
this.eventParaMap.putAll(parentCtrllr.getParaMap());
printEventParamMap();
log.info("New persistent connection created " + event_name);
}
@Override
public void run() {
Parameters p = null;
try {
modifyEventParamMap(Constants.KSETTING_REST_API_URL, getUriMethod(parentCtrllr.getProperties().authorizationEnabled())
+ parentCtrllr.getCfgInfo().getController_restapiUrl()
+ parentCtrllr.getCfgInfo().getController_subscriptionUrl());
modifyEventParamMap(Constants.KDEFAULT_TEMP_FILENAME, event_subscriptionTemplate);
modifyEventParamMap(Constants.KSETTING_REST_UNAME, parentCtrllr.getCfgInfo().getController_restapiUser());
modifyEventParamMap(Constants.KSETTING_REST_PASSWD, parentCtrllr.getCfgInfo().getController_restapiPassword());
modifyEventParamMap(Constants.KSETTING_HTTP_METHOD, parentCtrllr.getCfgInfo().getController_subsMethod());
parentCtrllr.getRestApiCallNode().sendRequest(eventParaMap, ctx, null);
} catch (Exception e) {
log.error("Exception occured!", e);
Thread.currentThread().interrupt();
}
/* Retrieve url from result and construct SSE url */
if (event_sseventUrlEmbed) {
String key = getEventParamMapValue(Constants.KSETTING_RESP_PREFIX).concat(".").concat(event_sseventsField);
log.info("key " + key);
this.event_sseventsUrl = ctx.getAttribute(key);
}
log.info("SSE received url " + event_sseventsUrl);
try {
p = getParameters(eventParaMap);
} catch (Exception e) {
log.error("Exception occured!", e);
Thread.currentThread().interrupt();
}
printEventParamMap();
String url = getUriMethod(parentCtrllr.getProperties().authorizationEnabled()) +
parentCtrllr.getCfgInfo().getController_restapiUrl() + event_sseventsUrl;
Client client = ignoreSslClient().register(SseFeature.class);
WebTarget target = addAuthType(client, p).target(url);
String tokenId = getEventParamMapValue(Constants.KSETTING_TOKENID);
String headerName = "X-ACCESS-TOKEN";
if (tokenId == null) {
headerName = HttpHeaders.AUTHORIZATION;
tokenId = getAuthorizationToken(parentCtrllr.getCfgInfo().getController_restapiUser(),
parentCtrllr.getCfgInfo().getController_restapiPassword());
}
AdditionalHeaderWebTarget newTarget = new AdditionalHeaderWebTarget(target, tokenId, headerName);
EventSource eventSource = EventSource.target(newTarget).build();
eventSource.register(new DataChangeEventListener(this));
eventSource.open();
log.info("Connected to SSE source");
while (running) {
try {
log.info("SSE state " + eventSource.isOpen());
Thread.sleep(5000);
} catch (InterruptedException ie) {
log.info("Exception: " + ie.getMessage());
Thread.currentThread().interrupt();
running = false;
}
}
eventSource.close();
log.info("Closed connection to SSE source");
}
private String getAuthorizationToken(String userName, String password) {
return "Basic " + Base64.getEncoder().encodeToString((
userName + ":" + password).getBytes());
}
private Client ignoreSslClient() {
SSLContext sslcontext = null;
try {
sslcontext = SSLContext.getInstance("TLS");
sslcontext.init(null, new TrustManager[]{new X509TrustManager() {
@Override
public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
}
@Override
public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
}
}}, new java.security.SecureRandom());
} catch (NoSuchAlgorithmException | KeyManagementException e) {
throw new IllegalStateException(e);
}
return ClientBuilder.newBuilder().sslContext(sslcontext).hostnameVerifier((s1, s2) -> true).build();
}
public String getEvent_ruleId() {
return event_ruleId;
}
public void modifyEventParamMap(String fieldName, String value) {
eventParaMap.put(fieldName, value);
}
public String getEventParamMapValue(String fieldName) {
return eventParaMap.get(fieldName);
}
public void printEventParamMap() {
log.info("----------------Event Param Map-------------------");
for (String name : eventParaMap.keySet()) {
String value = eventParaMap.get(name);
log.info(name + " : " + value);
}
}
}
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