1 files changed, 102 insertions, 0 deletions
diff --git a/main/src/main/java/org/onap/policy/pap/main/rest/PdpGroupHealthCheckControllerV1.java b/main/src/main/java/org/onap/policy/pap/main/rest/PdpGroupHealthCheckControllerV1.java
new file mode 100644
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--- /dev/null
+++ b/main/src/main/java/org/onap/policy/pap/main/rest/PdpGroupHealthCheckControllerV1.java
@@ -0,0 +1,102 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * 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.pap.main.rest;
+
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
+import io.swagger.annotations.ApiResponse;
+import io.swagger.annotations.ApiResponses;
+import io.swagger.annotations.Authorization;
+import io.swagger.annotations.Extension;
+import io.swagger.annotations.ExtensionProperty;
+import io.swagger.annotations.ResponseHeader;
+
+import java.util.UUID;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.HeaderParam;
+import javax.ws.rs.Path;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+
+import org.apache.commons.lang3.tuple.Pair;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.pdp.concepts.Pdps;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Class to provide REST end point for PAP component to fetch health status of all PDPs registered with PAP.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class PdpGroupHealthCheckControllerV1 extends PapRestControllerV1 {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(PdpGroupHealthCheckControllerV1.class);
+
+    private final PdpGroupHealthCheckProvider provider = new PdpGroupHealthCheckProvider();
+
+    /**
+     * Returns health status of all PDPs registered with PAP.
+     *
+     * @param requestId request ID used in ONAP logging
+     * @return a response
+     */
+    // @formatter:off
+    @GET
+    @Path("pdps/healthcheck")
+    @ApiOperation(value = "Returns health status of all PDPs registered with PAP",
+        notes = "Queries health status of all PDPs, returning all pdps health status",
+        response = Pdps.class,
+        tags = {"Policy Administration (PAP) API"},
+        authorizations = @Authorization(value = AUTHORIZATION_TYPE),
+        responseHeaders = {
+            @ResponseHeader(name = VERSION_MINOR_NAME, description = VERSION_MINOR_DESCRIPTION,
+                            response = String.class),
+            @ResponseHeader(name = VERSION_PATCH_NAME, description = VERSION_PATCH_DESCRIPTION,
+                            response = String.class),
+            @ResponseHeader(name = VERSION_LATEST_NAME, description = VERSION_LATEST_DESCRIPTION,
+                            response = String.class),
+            @ResponseHeader(name = REQUEST_ID_NAME, description = REQUEST_ID_HDR_DESCRIPTION,
+                            response = UUID.class)},
+        extensions = {@Extension(name = EXTENSION_NAME,
+            properties = {@ExtensionProperty(name = API_VERSION_NAME, value = API_VERSION),
+                @ExtensionProperty(name = LAST_MOD_NAME, value = LAST_MOD_RELEASE)})})
+    @ApiResponses(value = {@ApiResponse(code = AUTHENTICATION_ERROR_CODE, message = AUTHENTICATION_ERROR_MESSAGE),
+                    @ApiResponse(code = AUTHORIZATION_ERROR_CODE, message = AUTHORIZATION_ERROR_MESSAGE),
+                    @ApiResponse(code = SERVER_ERROR_CODE, message = SERVER_ERROR_MESSAGE)})
+    // @formatter:on
+
+    public Response pdpGroupHealthCheck(
+            @HeaderParam(REQUEST_ID_NAME) @ApiParam(REQUEST_ID_PARAM_DESCRIPTION) final UUID requestId) {
+
+        try {
+            final Pair<Status, Pdps> pair = provider.fetchPdpGroupHealthStatus();
+            return addLoggingHeaders(addVersionControlHeaders(Response.status(pair.getLeft())), requestId)
+                    .entity(pair.getRight()).build();
+        } catch (final PfModelException exp) {
+            LOGGER.info("pdpGroup health check failed", exp);
+            return addLoggingHeaders(
+                    addVersionControlHeaders(Response.status(exp.getErrorResponse().getResponseCode())), requestId)
+                            .entity(exp.getErrorResponse()).build();
+        }
+    }
+}