X-Git-Url: https://gerrit.onap.org/r/gitweb?a=blobdiff_plain;f=applications%2Fcommon%2Fsrc%2Fmain%2Fjava%2Forg%2Fonap%2Fpolicy%2Fpdp%2Fxacml%2Fapplication%2Fcommon%2FPolicyApiCaller.java;fp=applications%2Fcommon%2Fsrc%2Fmain%2Fjava%2Forg%2Fonap%2Fpolicy%2Fpdp%2Fxacml%2Fapplication%2Fcommon%2FPolicyApiCaller.java;h=9d47517a6d7fc0dd687ae1e2ab499cd82819aee8;hb=98873e8c202426b9d74d9460ebd30b57fa4c7eb7;hp=0000000000000000000000000000000000000000;hpb=30b9aa0d2e2e6b954e2ce25537d7d7ca81d3a5a4;p=policy%2Fxacml-pdp.git

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
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--- /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);
+    }
+}