1 files changed, 227 insertions, 0 deletions
diff --git a/common/src/main/java/org/openecomp/mso/client/policy/RestClient.java b/common/src/main/java/org/openecomp/mso/client/policy/RestClient.java
new file mode 100644
index 0000000000..4e6ffd1c6a
--- /dev/null
+++ b/common/src/main/java/org/openecomp/mso/client/policy/RestClient.java
@@ -0,0 +1,227 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2017 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.mso.client.policy;
+
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Optional;
+import java.util.UUID;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.ClientResponseFilter;
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.client.Invocation.Builder;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.UriBuilder;
+import javax.ws.rs.ext.ContextResolver;
+
+import org.apache.log4j.Logger;
+import org.openecomp.mso.client.RestProperties;
+import org.openecomp.mso.logger.MsoLogger;
+import org.springframework.stereotype.Service;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+@Service
+public abstract class RestClient {
+	protected static final String ECOMP_COMPONENT_NAME = "MSO";
+	
+	private static final int MAX_PAYLOAD_SIZE = 1024 * 1024;
+	private WebTarget webTarget;
+
+	protected final Map<String, String> headerMap;
+	protected final MsoLogger msoLogger;
+	protected URL host;
+	protected Optional<URI> path;
+	protected Logger logger;
+	protected String accept;
+	protected String contentType;
+	protected UUID requestId;
+
+	protected RestClient(RestProperties props, UUID requestId, Optional<URI> path) {
+		logger = Logger.getLogger(getClass().getName());
+		msoLogger = MsoLogger.getMsoLogger(MsoLogger.Catalog.GENERAL);
+		this.requestId = requestId;
+		headerMap = new HashMap<>();
+		try {
+			host = props.getEndpoint();
+		} catch (MalformedURLException e) {
+			logger.error("url not valid", e);
+			throw new RuntimeException(e);
+		}
+		
+		this.path = path;
+		initializeClient(getClient());
+	}
+
+	protected RestClient(RestProperties props, UUID requestId, Optional<URI> path, String accept, String contentType) {
+		this(props, requestId, path);
+		this.accept = accept;
+		this.contentType = contentType;
+		this.requestId = requestId;
+
+	}
+
+	protected RestClient(URL host, UUID requestId, String contentType) {
+		headerMap = new HashMap<>();
+		logger = Logger.getLogger(getClass().getName());
+		msoLogger = MsoLogger.getMsoLogger(MsoLogger.Catalog.GENERAL);
+		this.path = Optional.empty();
+		this.host = host;
+		this.contentType = contentType;
+		this.requestId = requestId;
+		initializeClient(getClient());
+	}
+
+	/**
+	 * Override method to return false to disable logging.
+	 * 
+	 * @return true - to enable logging, false otherwise
+	 */
+	protected boolean enableLogging() {
+		return true;
+	}
+	
+	/**
+	 * Override method to return custom value for max payload size.
+	 * 
+	 * @return Default value for MAX_PAYLOAD_SIZE = 1024 * 1024
+	 */
+	protected int getMaxPayloadSize()
+	{
+		return MAX_PAYLOAD_SIZE;
+	}
+
+	protected Builder getBuilder() {
+
+		Builder builder = webTarget.request();
+		initializeHeaderMap(headerMap);
+
+		for (Entry<String, String> entry : headerMap.entrySet()) {
+			builder.header(entry.getKey(), entry.getValue());
+		}
+		return builder;
+	}
+
+	protected abstract void initializeHeaderMap(Map<String, String> headerMap);
+
+	protected abstract Optional<ClientResponseFilter> addResponseFilter();
+
+	public abstract RestClient addRequestId(UUID requestId);
+
+	protected ContextResolver<ObjectMapper> getMapper() {
+		return new CommonObjectMapperProvider();
+	}
+
+	protected String getAccept() {
+		return accept;
+	}
+
+	protected String getContentType() {
+		return contentType;
+	}
+
+	protected String getMergeContentType() {
+		return "application/merge-patch+json";
+	}
+
+	protected Client getClient() {
+		return ClientBuilder.newBuilder().build();
+	}
+
+	protected UUID getRequestId() {
+		return this.requestId;
+	}
+	protected void initializeClient(Client client) {
+		if (this.enableLogging()) {
+			client.register(logger).register(new LoggingFilter(this.getMaxPayloadSize()));
+		}
+		client.register(this.getMapper());
+		Optional<ClientResponseFilter> responseFilter = this.addResponseFilter();
+		responseFilter.ifPresent(clientResponseFilter -> client.register(clientResponseFilter));
+		webTarget = path.<WebTarget>map(uri -> client.target(UriBuilder.fromUri(host + uri.toString())))
+			.orElseGet(() -> client.target(host.toString()));
+		this.accept = MediaType.APPLICATION_JSON;
+		this.contentType = MediaType.APPLICATION_JSON;
+	}
+
+	public Response get() {
+		return this.getBuilder().accept(this.getAccept()).get();
+	}
+
+	public Response post(Object obj) {
+		return this.getBuilder().accept(this.getAccept()).post(Entity.entity(obj, this.getContentType()));
+	}
+
+	public Response patch(Object obj) {
+		return this.getBuilder().header("X-HTTP-Method-Override", "PATCH").accept(this.getAccept())
+				.post(Entity.entity(obj, this.getMergeContentType()));
+	}
+
+	public Response put(Object obj) {
+		return this.getBuilder().accept(this.getAccept()).put(Entity.entity(obj, this.getContentType()));
+	}
+
+	public Response delete() {
+		return this.getBuilder().accept(this.getAccept()).delete();
+	}
+
+	public Response delete(Object obj) {
+		return this.getBuilder().header("X-HTTP-Method-Override", "DELETE").accept(this.getAccept())
+				.put(Entity.entity(obj, this.getContentType()));
+	}
+
+	public <T> T get(Class<T> resultClass) {
+		return this.get().readEntity(resultClass);
+	}
+
+	public <T> T get(GenericType<T> resultClass) {
+		return this.get().readEntity(resultClass);
+	}
+
+	public <T> T post(Object obj, Class<T> resultClass) {
+		return this.post(obj).readEntity(resultClass);
+	}
+
+	public <T> T patch(Object obj, Class<T> resultClass) {
+		return this.patch(obj).readEntity(resultClass);
+	}
+
+	public <T> T put(Object obj, Class<T> resultClass) {
+		return this.put(obj).readEntity(resultClass);
+	}
+
+	public <T> T delete(Class<T> resultClass) {
+		return this.delete().readEntity(resultClass);
+	}
+	
+	public <T> T delete(Object obj, Class<T> resultClass) {
+		return this.delete(obj).readEntity(resultClass);
+	}
+}