| // |
| // ======================================================================== |
| // Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.websocket.jsr356; |
| |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import javax.websocket.Decoder; |
| import javax.websocket.EndpointConfig; |
| |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| import org.eclipse.jetty.websocket.common.scopes.WebSocketContainerScope; |
| import org.eclipse.jetty.websocket.common.scopes.WebSocketSessionScope; |
| import org.eclipse.jetty.websocket.jsr356.metadata.DecoderMetadata; |
| import org.eclipse.jetty.websocket.jsr356.metadata.DecoderMetadataSet; |
| |
| /** |
| * Factory for {@link DecoderMetadata} |
| * <p> |
| * Relies on search order of parent {@link DecoderFactory} instances as such. |
| * <ul> |
| * <li>From Static DecoderMetadataSet (based on data in annotations and static EndpointConfig)</li> |
| * <li>From Composite DecoderMetadataSet (based static and instance specific EndpointConfig)</li> |
| * <li>Container declared DecoderMetadataSet (primitives)</li> |
| * </ul> |
| */ |
| public class DecoderFactory implements Configurable |
| { |
| public static class Wrapper implements Configurable |
| { |
| private final Decoder decoder; |
| private final DecoderMetadata metadata; |
| |
| private Wrapper(Decoder decoder, DecoderMetadata metadata) |
| { |
| this.decoder = decoder; |
| this.metadata = metadata; |
| } |
| |
| public Decoder getDecoder() |
| { |
| return decoder; |
| } |
| |
| public DecoderMetadata getMetadata() |
| { |
| return metadata; |
| } |
| |
| @Override |
| public void init(EndpointConfig config) |
| { |
| this.decoder.init(config); |
| } |
| } |
| |
| private static final Logger LOG = Log.getLogger(DecoderFactory.class); |
| |
| private final DecoderMetadataSet metadatas; |
| private final WebSocketContainerScope containerScope; |
| private DecoderFactory parentFactory; |
| private Map<Class<?>, Wrapper> activeWrappers; |
| |
| public DecoderFactory(WebSocketContainerScope containerScope, DecoderMetadataSet metadatas) |
| { |
| this(containerScope,metadatas,null); |
| } |
| |
| public DecoderFactory(WebSocketSessionScope sessionScope, DecoderMetadataSet metadatas, DecoderFactory parentFactory) |
| { |
| this(sessionScope.getContainerScope(),metadatas,parentFactory); |
| } |
| |
| protected DecoderFactory(WebSocketContainerScope containerScope, DecoderMetadataSet metadatas, DecoderFactory parentFactory) |
| { |
| Objects.requireNonNull(containerScope,"Container Scope cannot be null"); |
| this.containerScope = containerScope; |
| this.metadatas = metadatas; |
| this.activeWrappers = new ConcurrentHashMap<>(); |
| this.parentFactory = parentFactory; |
| } |
| |
| public Decoder getDecoderFor(Class<?> type) |
| { |
| Wrapper wrapper = getWrapperFor(type); |
| if (wrapper == null) |
| { |
| return null; |
| } |
| return wrapper.decoder; |
| } |
| |
| public DecoderMetadata getMetadataFor(Class<?> type) |
| { |
| if (LOG.isDebugEnabled()) |
| { |
| LOG.debug("getMetadataFor({})",type); |
| } |
| |
| DecoderMetadata metadata = metadatas.getMetadataByType(type); |
| |
| if (metadata != null) |
| { |
| return metadata; |
| } |
| |
| if (parentFactory != null) |
| { |
| return parentFactory.getMetadataFor(type); |
| } |
| |
| return null; |
| } |
| |
| public Wrapper getWrapperFor(Class<?> type) |
| { |
| synchronized (activeWrappers) |
| { |
| Wrapper wrapper = activeWrappers.get(type); |
| |
| // Try parent (if needed) |
| if ((wrapper == null) && (parentFactory != null)) |
| { |
| wrapper = parentFactory.getWrapperFor(type); |
| } |
| |
| if (wrapper == null) |
| { |
| // Attempt to create Wrapper on demand |
| DecoderMetadata metadata = metadatas.getMetadataByType(type); |
| if (metadata == null) |
| { |
| return null; |
| } |
| wrapper = newWrapper(metadata); |
| // track wrapper |
| activeWrappers.put(type,wrapper); |
| } |
| |
| return wrapper; |
| } |
| } |
| |
| @Override |
| public void init(EndpointConfig config) |
| { |
| if (LOG.isDebugEnabled()) |
| { |
| LOG.debug("init({})",config); |
| } |
| // Instantiate all declared decoders |
| for (DecoderMetadata metadata : metadatas) |
| { |
| Wrapper wrapper = newWrapper(metadata); |
| activeWrappers.put(metadata.getObjectType(),wrapper); |
| } |
| |
| // Initialize all decoders |
| for (Wrapper wrapper : activeWrappers.values()) |
| { |
| wrapper.decoder.init(config); |
| } |
| } |
| |
| public Wrapper newWrapper(DecoderMetadata metadata) |
| { |
| Class<? extends Decoder> decoderClass = metadata.getCoderClass(); |
| try |
| { |
| Decoder decoder = containerScope.getObjectFactory().createInstance(decoderClass); |
| return new Wrapper(decoder,metadata); |
| } |
| catch (InstantiationException | IllegalAccessException e) |
| { |
| throw new IllegalStateException("Unable to instantiate Decoder: " + decoderClass.getName()); |
| } |
| } |
| } |