diff options
Diffstat (limited to 'applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/PolicyApiCaller.java')
-rw-r--r-- | applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/PolicyApiCaller.java | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/PolicyApiCaller.java b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/PolicyApiCaller.java new file mode 100644 index 00000000..9d47517a --- /dev/null +++ b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/PolicyApiCaller.java @@ -0,0 +1,106 @@ +/*- + * ============LICENSE_START======================================================= + * Copyright (C) 2019 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. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.pdp.xacml.application.common; + +import java.net.HttpURLConnection; +import javax.ws.rs.core.Response; +import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams; +import org.onap.policy.common.endpoints.http.client.HttpClient; +import org.onap.policy.common.endpoints.http.client.HttpClientConfigException; +import org.onap.policy.common.endpoints.http.client.HttpClientFactoryInstance; +import org.onap.policy.common.endpoints.parameters.RestServerParameters; +import org.onap.policy.common.gson.GsonMessageBodyHandler; +import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyType; +import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeIdentifier; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Methods to access policy-api via REST service calls. + */ +public class PolicyApiCaller { + private static Logger logger = LoggerFactory.getLogger(PolicyApiCaller.class); + + private static final String POLICY_TYPE_URI = "/policy/api/v1/policytypes/"; + private static final String POLICY_TYPE_VERSION_URI = "/versions/"; + + private final HttpClient httpClient; + + /** + * Constructs the object. + * + * @param params target specification + * @throws PolicyApiException if an error occurs + */ + public PolicyApiCaller(RestServerParameters params) throws PolicyApiException { + BusTopicParams busParams = new BusTopicParams(); + busParams.setClientName("policy-api"); + busParams.setHostname(params.getHost()); + busParams.setManaged(false); + busParams.setPassword(params.getPassword()); + busParams.setPort(params.getPort()); + busParams.setSerializationProvider(GsonMessageBodyHandler.class.getName()); + busParams.setUseHttps(params.isHttps()); + busParams.setUserName(params.getUserName()); + + try { + httpClient = makeClient(busParams); + } catch (HttpClientConfigException e) { + throw new PolicyApiException("connection to host: " + busParams.getHostname(), e); + } + } + + /** + * Gets a policy type from policy-api. + * + * @param type policy type of interest + * @return the desired policy type + * @throws PolicyApiException if an error occurs + */ + public ToscaPolicyType getPolicyType(ToscaPolicyTypeIdentifier type) throws PolicyApiException { + + try { + Response resp = httpClient + .get(POLICY_TYPE_URI + type.getName() + POLICY_TYPE_VERSION_URI + type.getVersion()); + + switch (resp.getStatus()) { + case HttpURLConnection.HTTP_OK: + return resp.readEntity(ToscaPolicyType.class); + case HttpURLConnection.HTTP_NOT_FOUND: + logger.warn("policy-api not found {}", resp); + throw new NotFoundException(type.toString()); + default: + logger.warn("policy-api request error {}", resp); + throw new PolicyApiException(type.toString()); + } + + } catch (RuntimeException e) { + logger.warn("policy-api connection error"); + throw new PolicyApiException(type.toString(), e); + } + } + + // these methods may be overridden by junit tests + + protected HttpClient makeClient(BusTopicParams busParams) throws HttpClientConfigException { + return HttpClientFactoryInstance.getClientFactory().build(busParams); + } +} |