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- /*
- * Copyright 2000-2018 Vaadin Ltd.
- *
- * 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.
- */
-
- package com.vaadin.server;
-
- import java.io.Serializable;
- import java.lang.reflect.Field;
- import java.lang.reflect.Method;
- import java.util.HashMap;
- import java.util.Map;
- import java.util.logging.Level;
- import java.util.logging.Logger;
-
- import com.vaadin.shared.communication.ServerRpc;
-
- /**
- * Server side RPC manager that handles RPC calls coming from the client.
- *
- * Each {@link RpcTarget} (typically a {@link ClientConnector}) should have its
- * own instance of {@link ServerRpcManager} if it wants to receive RPC calls
- * from the client.
- *
- * @since 7.0
- */
- public class ServerRpcManager<T extends ServerRpc> implements Serializable {
-
- private final T implementation;
- private final Class<T> rpcInterface;
-
- /**
- * Wrapper exception for exceptions which occur during invocation of an RPC
- * call.
- *
- * @author Vaadin Ltd
- * @since 7.0
- *
- */
- public static class RpcInvocationException extends Exception {
-
- public RpcInvocationException() {
- super();
- }
-
- public RpcInvocationException(String message, Throwable cause) {
- super(message, cause);
- }
-
- public RpcInvocationException(String message) {
- super(message);
- }
-
- public RpcInvocationException(Throwable cause) {
- super(cause);
- }
-
- }
-
- private static final Map<Class<?>, Class<?>> BOXED_TYPES = new HashMap<>();
- static {
- try {
- Class<?>[] boxClasses = new Class<?>[] { Boolean.class, Byte.class,
- Short.class, Character.class, Integer.class, Long.class,
- Float.class, Double.class };
- for (Class<?> boxClass : boxClasses) {
- Field typeField = boxClass.getField("TYPE");
- Class<?> primitiveType = (Class<?>) typeField.get(boxClass);
- BOXED_TYPES.put(primitiveType, boxClass);
- }
- } catch (Exception e) {
- throw new RuntimeException(e);
- }
- }
-
- /**
- * Create a RPC manager for an RPC target.
- *
- * @param implementation
- * RPC interface implementation for the target
- * @param rpcInterface
- * RPC interface type
- */
- public ServerRpcManager(T implementation, Class<T> rpcInterface) {
- this.implementation = implementation;
- this.rpcInterface = rpcInterface;
- }
-
- /**
- * Invoke a method in a server side RPC target class. This method is to be
- * used by the RPC framework and unit testing tools only.
- *
- * @param target
- * non-null target of the RPC call
- * @param invocation
- * method invocation to perform
- * @throws RpcInvocationException
- */
- public static void applyInvocation(ClientConnector target,
- ServerRpcMethodInvocation invocation)
- throws RpcInvocationException {
- ServerRpcManager<?> manager = target
- .getRpcManager(invocation.getInterfaceName());
- if (manager != null) {
- manager.applyInvocation(invocation);
- } else {
- getLogger().log(Level.WARNING,
- "RPC call received for RpcTarget {0} ({1}) but the target has not registered any RPC interfaces",
- new Object[] { target.getClass().getName(),
- invocation.getConnectorId() });
- }
- }
-
- /**
- * Returns the RPC interface implementation for the RPC target.
- *
- * @return RPC interface implementation
- */
- protected T getImplementation() {
- return implementation;
- }
-
- /**
- * Returns the RPC interface type managed by this RPC manager instance.
- *
- * @return RPC interface type
- */
- public Class<T> getRpcInterface() {
- return rpcInterface;
- }
-
- /**
- * Invoke a method in a server side RPC target class. This method is to be
- * used by the RPC framework and unit testing tools only.
- *
- * @param invocation
- * method invocation to perform
- */
- public void applyInvocation(ServerRpcMethodInvocation invocation)
- throws RpcInvocationException {
- Method method = invocation.getMethod();
- Object[] arguments = invocation.getParameters();
- try {
- method.invoke(implementation, arguments);
- } catch (Exception e) {
- throw new RpcInvocationException(
- "Unable to invoke method " + invocation.getMethodName()
- + " in " + invocation.getInterfaceName(),
- e);
- }
- }
-
- private static Logger getLogger() {
- return Logger.getLogger(ServerRpcManager.class.getName());
- }
-
- /**
- * Returns an RPC proxy for a given client to server RPC interface for the
- * given component or extension.
- *
- * @param connector
- * the connector for which to the RPC proxy
- * @param rpcInterface
- * the RPC interface type
- *
- * @return a server RPC handler which can be used to invoke RPC methods
- * @since 8.0
- */
- public static <T extends ServerRpc> T getRpcProxy(ClientConnector connector,
- final Class<T> rpcInterface) {
-
- @SuppressWarnings("unchecked")
- ServerRpcManager<T> rpcManager = (ServerRpcManager<T>) connector
- .getRpcManager(rpcInterface.getName());
- if (rpcManager == null) {
- return null;
- }
- return rpcManager.getImplementation();
- }
-
- }
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