1 files changed, 131 insertions, 0 deletions
diff --git a/simple/simple-http/src/main/java/org/simpleframework/http/core/RequestReader.java b/simple/simple-http/src/main/java/org/simpleframework/http/core/RequestReader.java
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+++ b/simple/simple-http/src/main/java/org/simpleframework/http/core/RequestReader.java
@@ -0,0 +1,131 @@
+/*
+ * RequestReader.java February 2001
+ *
+ * Copyright (C) 2001, Niall Gallagher <niallg@users.sf.net>
+ *
+ * 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 org.simpleframework.http.core;
+
+import static org.simpleframework.http.core.ContainerEvent.ERROR;
+
+import java.nio.channels.SocketChannel;
+
+import org.simpleframework.transport.Channel;
+import org.simpleframework.transport.reactor.Operation;
+import org.simpleframework.transport.trace.Trace;
+
+/**
+ * The <code>RequestReader</code> object is used to read the bytes 
+ * that form the request entity. In order to execute a read operation 
+ * the socket must be read ready. This is determined using the socket 
+ * object, which is registered with a controller. If at any point the 
+ * reading results in an error the operation is cancelled and the 
+ * collector is closed, which shuts down the connection.
+ * 
+ * @author Niall Gallagher
+ * 
+ * @see org.simpleframework.transport.reactor.Reactor
+ */ 
+class RequestReader implements Operation {   
+
+   /**
+    * This is the selector used to process the collection events.
+    */
+   private final Controller controller;   
+
+   /**
+    * This is the collector used to consume the entity bytes.
+    */
+   private final Collector collector;   
+   
+   /**
+    * This is the channel object associated with the collector.
+    */
+   private final Channel channel;
+   
+   /**
+    * This is used to collect any trace information.
+    */
+   private final Trace trace;
+   
+   /**
+    * Constructor for the <code>RequestReader</code> object. This is
+    * used to collect the data required to compose a HTTP request.
+    * Once all the data has been read by this it is dispatched. 
+    * 
+    * @param controller the controller object used to process events
+    * @param collector this is the task used to collect the entity
+    */
+   public RequestReader(Controller controller, Collector collector){
+      this.channel = collector.getChannel();
+      this.trace = channel.getTrace();
+      this.collector = collector;        
+      this.controller = controller;    
+   }   
+   
+   /**
+    * This is used to acquire the trace object that is associated
+    * with the operation. A trace object is used to collection details
+    * on what operations are being performed. For instance it may 
+    * contain information relating to I/O events or errors. 
+    * 
+    * @return this returns the trace associated with this operation
+    */    
+   public Trace getTrace() {
+      return trace;
+   }   
+   
+   /**
+    * This is the <code>SocketChannel</code> used to determine if the
+    * connection has some bytes that can be read. If it contains any
+    * data then that data is read from and is used to compose the 
+    * request entity, which consists of a HTTP header and body.
+    * 
+    * @return this returns the socket for the connected pipeline
+    */
+   public SocketChannel getChannel() {
+      return channel.getSocket();
+   }
+
+   /**
+    * This <code>run</code> method is used to collect the bytes from
+    * the connected channel. If a sufficient amount of data is read
+    * from the socket to form a HTTP entity then the collector uses
+    * the <code>Selector</code> object to dispatch the request. This
+    * is sequence of events that occur for each transaction.
+    */
+   public void run() {
+      try {
+         collector.collect(controller);
+      }catch(Throwable cause){
+         trace.trace(ERROR, cause);
+         channel.close();
+      } 
+   }
+   
+   /**
+    * This is used to cancel the operation if it has timed out. If 
+    * the retry is waiting too long to read content from the socket
+    * then the retry is cancelled and the underlying transport is 
+    * closed. This helps to clean up occupied resources.     
+    */       
+   public void cancel() {
+      try {
+         channel.close();
+      } catch(Throwable cause) {
+         trace.trace(ERROR, cause);
+      }
+   }  
+}