flex.messaging.messages.Message Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 flex.messaging.messages;
import java.io.Serializable;
import java.util.Map;
/**
* Messages are sent from Endpoints into the MessageBroker, which then
* sends them to a Service. The MessageBroker also sends Messages to
* Endpoints, and a Service may ask its Broker to send Messages to
* Endpoints.
*
* @author neville
*/
public interface Message
extends Serializable, Cloneable, Comparable //, javax.jms.Message
{
// Message header name constants
/**
* This header is used to transport the FlexClient Id value in messages
* sent clients to the server.
*/
String FLEX_CLIENT_ID_HEADER = "DSId";
/**
* The name for the destination client Id header, used to target a message
* back to the proper client when multiple clients share a channel.
*/
String DESTINATION_CLIENT_ID_HEADER = "DSDstClientId";
/**
* The name for the endpoint header.
*/
String ENDPOINT_HEADER = "DSEndpoint";
/**
* @exclude
* Used internally to enable/disable validation of the channel endpoint that a
* message for a destination arrived over.
*/
String VALIDATE_ENDPOINT_HEADER = "DSValidateEndpoint";
/**
* A message can have a priority header with a 0-9 numerical value (0 being lowest)
* and the server can choose to use this numerical value to prioritize messages to clients.
*/
String PRIORITY_HEADER = "DSPriority";
/**
* The default priority value for messages.
*/
int DEFAULT_PRIORITY = 4;
/**
* The name for the header where remote credentials will be passed.
*/
String REMOTE_CREDENTIALS_HEADER = "DSRemoteCredentials";
/**
* The name of the header that reports which character set encoding was
* used to create remote credentials.
*/
String REMOTE_CREDENTIALS_CHARSET_HEADER = "DSRemoteCredentialsCharset";
/**
* Messages sent with a defined request timeout use this header.
* The request timeout value is set on outbound messages by services or
* channels and the value controls how long the corresponding MessageResponder
* will wait for an acknowledgement, result or fault response for the message
* before timing out the request.
*/
String REQUEST_TIMEOUT_MILLIS_HEADER = "DSRequestTimeoutMillis";
/**
* Presence of param means that auto-sync is false for the destination.
*/
String SYNC_HEADER = "sync";
/**
* A status code can provide context about the nature of a response
* message. For example, messages received from an HTTP based channel may
* need to report the HTTP response status code (if available).
*/
String STATUS_CODE_HEADER = "DSStatusCode";
/**
* Returns the client id indicating the client that sent the message.
*
* @return The client id indicating the client that sent the message.
*/
Object getClientId();
/**
* Sets the client id indicating the client that sent the message.
*
* @param value The client id to set for the message.
*/
void setClientId(Object value);
/**
* Returns the destination that the message targets.
*
* @return The destination that the message targets.
*/
String getDestination();
/**
* Sets the destination that the message targets.
*
* @param value The destination that the message targets.
*/
void setDestination(String value);
/**
* Returns the unique message id.
*
* @return The unique message id.
*/
String getMessageId();
/**
* Sets the unique message id.
* The id value should be universally unique.
*
* @param value The unique message id.
*/
void setMessageId(String value);
/**
* Returns the timestamp for the message.
* Number of milleseconds since the epoch.
*
* @return The timestamp for the message.
*/
long getTimestamp();
/**
* Sets the timestamp for the message.
* Number of milliseconds since the epoch.
*
* @param value The timestamp for the message.
*/
void setTimestamp(long value);
/**
* Returns the time to live for the message. This is the number of
* milliseconds beyond the message timestamp that the message is
* considered valid and deliverable.
*
* @return The time to live for the message.
*/
long getTimeToLive();
/**
* Sets the time to live for the message. This is the number of milliseconds
* beyond the message timestamp that the message will be considered valid and
* deliverable.
*
* @param value The time to live for the message.
*/
void setTimeToLive(long value);
/**
* Returns the body of the message.
*
* @return The body of the message.
*/
Object getBody();
/**
* Sets the body of the message.
*
* @param value The body of the message.
*/
void setBody(Object value);
/**
* Returns the headers for the message.
*
* @return The headers for the message.
*/
Map getHeaders();
/**
* Sets the headers for the message.
*
* @param value The headers to set on the message.
*/
void setHeaders(Map value);
/**
* Returns a header value corresponding to the passed header name.
* If no header with this name exists, null is returned.
*
* @param name The header name to retrieve a value for.
* @return The header value.
*/
Object getHeader(String name);
/**
* Sets a header on the message.
*
* @param name The name of the header to set.
* @param value The value for the header.
*/
void setHeader(String name, Object value);
/**
* Tests whether a header with the passed name exists.
*
* @param name The header to test for existence.
* @return true if the headers exists; otherwise false.
*/
boolean headerExists(String name);
/**
* Returns a clone of the message.
*
* @return A clone of the message.
*/
Object clone();
}
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