2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2019-2020 Nordix Foundation.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.apex.plugins.event.carrier.restclient;
24 import java.util.Optional;
25 import java.util.Properties;
28 import javax.ws.rs.client.Client;
29 import javax.ws.rs.client.ClientBuilder;
30 import javax.ws.rs.client.Entity;
31 import javax.ws.rs.core.Response;
33 import org.onap.policy.apex.service.engine.event.ApexEventException;
34 import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
35 import org.onap.policy.apex.service.engine.event.ApexPluginsEventProducer;
36 import org.onap.policy.apex.service.parameters.carriertechnology.RestPluginCarrierTechnologyParameters;
37 import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
38 import org.slf4j.Logger;
39 import org.slf4j.LoggerFactory;
42 * Concrete implementation of an Apex event producer that sends events using REST.
44 * @author Joss Armstrong (joss.armstrong@ericsson.com)
47 public class ApexRestClientProducer extends ApexPluginsEventProducer {
48 private static final Logger LOGGER = LoggerFactory.getLogger(ApexRestClientProducer.class);
50 // The HTTP client that makes a REST call with an event from Apex
51 private Client client;
53 // The REST carrier properties
54 private RestClientCarrierTechnologyParameters restProducerProperties;
60 public void init(final String producerName, final EventHandlerParameters producerParameters)
61 throws ApexEventException {
62 this.name = producerName;
64 // Check and get the REST Properties
65 if (!(producerParameters.getCarrierTechnologyParameters() instanceof RestClientCarrierTechnologyParameters)) {
66 final String errorMessage =
67 "specified producer properties are not applicable to REST client producer (" + this.name + ")";
68 LOGGER.warn(errorMessage);
69 throw new ApexEventException(errorMessage);
71 restProducerProperties =
72 (RestClientCarrierTechnologyParameters) producerParameters.getCarrierTechnologyParameters();
74 // Check if the HTTP method has been set
75 if (restProducerProperties.getHttpMethod() == null) {
76 restProducerProperties.setHttpMethod(RestPluginCarrierTechnologyParameters.HttpMethod.POST);
79 if (!RestPluginCarrierTechnologyParameters.HttpMethod.POST.equals(restProducerProperties.getHttpMethod())
80 && !RestPluginCarrierTechnologyParameters.HttpMethod.PUT
81 .equals(restProducerProperties.getHttpMethod())) {
82 final String errorMessage = "specified HTTP method of \"" + restProducerProperties.getHttpMethod()
83 + "\" is invalid, only HTTP methods \"POST\" and \"PUT\" are supported "
84 + "for event sending on REST client producer (" + this.name + ")";
85 LOGGER.warn(errorMessage);
86 throw new ApexEventException(errorMessage);
89 // Initialize the HTTP client
90 client = ClientBuilder.newClient();
97 public void sendEvent(final long executionId, final Properties executionProperties, final String eventName,
99 super.sendEvent(executionId, executionProperties, eventName, event);
101 String untaggedUrl = restProducerProperties.getUrl();
102 if (executionProperties != null) {
103 Set<String> names = restProducerProperties.getKeysFromUrl();
104 Set<String> inputProperty = executionProperties.stringPropertyNames();
107 names.stream().map(Optional::of).forEach(op ->
108 op.filter(inputProperty::contains)
109 .orElseThrow(() -> new ApexEventRuntimeException(
110 "key \"" + op.get() + "\" specified on url \"" + restProducerProperties.getUrl()
111 + "\" not found in execution properties passed by the current policy"))
114 untaggedUrl = names.stream().reduce(untaggedUrl,
115 (acc, str) -> acc.replace("{" + str + "}", (String) executionProperties.get(str)));
119 // Send the event as a REST request
120 final Response response = sendEventAsRestRequest(untaggedUrl, (String) event);
122 // Check that the request worked
123 if (response.getStatus() != Response.Status.OK.getStatusCode()) {
124 final String errorMessage = "send of event to URL \"" + untaggedUrl + "\" using HTTP \""
125 + restProducerProperties.getHttpMethod() + "\" failed with status code " + response.getStatus()
126 + " and message \"" + response.readEntity(String.class) + "\", event:\n" + event;
127 LOGGER.warn(errorMessage);
128 throw new ApexEventRuntimeException(errorMessage);
131 if (LOGGER.isTraceEnabled()) {
132 LOGGER.trace("event sent from engine using {} to URL {} with HTTP {} : {} and response {} ", this.name,
133 untaggedUrl, restProducerProperties.getHttpMethod(), event, response);
142 // Close the HTTP session
147 * Send the event as a JSON string as a REST request.
149 * @param event the event to send
150 * @return the response to the JSON request
152 private Response sendEventAsRestRequest(final String untaggedUrl, final String event) {
153 // We have already checked that it is a PUT or POST request
154 if (RestPluginCarrierTechnologyParameters.HttpMethod.POST.equals(restProducerProperties.getHttpMethod())) {
155 return client.target(untaggedUrl).request("application/json")
156 .headers(restProducerProperties.getHttpHeadersAsMultivaluedMap()).post(Entity.json(event));
158 return client.target(untaggedUrl).request("application/json")
159 .headers(restProducerProperties.getHttpHeadersAsMultivaluedMap()).put(Entity.json(event));
164 * Hook for unit test mocking of HTTP client.
166 * @param client the mocked client
168 protected void setClient(final Client client) {
169 this.client = client;