MINA Component
Deprecated
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This component is deprecated as the Apache Mina 1.x project is EOL. Instead use MINA2 or Netty instead.
The mina: component is a transport for working with Apache MINA
Maven users will need to add the following dependency to their pom.xml
for this component:
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URI format
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You can specify a codec in the Registry using the codec option. If you are using TCP and no codec is specified then the textline
flag is used to determine if text line based codec or object serialization should be used instead. By default the object serialization is used.
For UDP if no codec is specified the default uses a basic ByteBuffer
based codec.
The VM protocol is used as a direct forwarding mechanism in the same JVM. See the MINA VM-Pipe API documentation for details.
A Mina producer has a default timeout value of 30 seconds, while it waits for a response from the remote server.
In normal use, camel-mina
only supports marshalling the body content—message headers and exchange properties are not sent.
However, the option, transferExchange, does allow you to transfer the exchange itself over the wire. See options below.
You can append query options to the URI in the following format, ?option=value&option=value&...
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Options
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Option | Default Value | Description |
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| You can refer to a named |
|
| You must use the |
|
| Camel 2.3: Whether or not to disconnect(close) from Mina session right after use. Can be used for both consumer and producer. |
|
| Only used for TCP. If no codec is specified, you can use this flag to indicate a text line based codec; if not specified or the value is |
|
| Only used for TCP and if textline=true. Sets the text line delimiter to use. Possible values are: |
|
| Setting to set endpoint as one-way or request-response. |
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| Sessions can be lazily created to avoid exceptions, if the remote server is not up and running when the Camel producer is started. |
|
| You can configure the timeout that specifies how long to wait for a response from a remote server. The timeout unit is in milliseconds, so 60000 is 60 seconds. The timeout is only used for Mina producer. |
| JVM Default | You can configure the encoding (a charset name) to use for the TCP textline codec and the UDP protocol. If not provided, Camel will use the JVM default Charset. |
|
| Only used for TCP. You can transfer the exchange over the wire instead of just the body. The following fields are transferred: In body, Out body, fault body, In headers, Out headers, fault headers, exchange properties, exchange exception. This requires that the objects are serializable. Camel will exclude any non-serializable objects and log it at |
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| You can enable the Apache MINA logging filter. Apache MINA uses |
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| You can set a list of Mina IoFilters to register. The
|
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| As of 2.1, you can set the textline protocol encoder max line length. By default the default value of Mina itself is used which are |
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| As of 2.1, you can set the textline protocol decoder max line length. By default the default value of Mina itself is used which are 1024. |
| 16 | The TCP producer is thread safe and supports concurrency much better. This option allows you to configure the number of threads in its thread pool for concurrent producers. Note: Camel has a pooled service which ensured it was already thread safe and supported concurrency already. |
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| The mina component installs a default codec if both, |
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| Camel 2.3: If sync is enabled then this option dictates MinaConsumer if it should disconnect where there is no reply to send back. |
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| Camel 2.3: If sync is enabled this option dictates MinaConsumer which logging level to use when logging a there is no reply to send back. Values are: |
clientMode | false | Camel 2.15: Consumer only. If the clientMode is true, mina consumer will connect the address as a TCP client. |
Using a custom codec
See the Mina documentation how to write your own codec. To use your custom codec with camel-mina
, you should register your codec in the Registry; for example, by creating a bean in the Spring XML file. Then use the codec
option to specify the bean ID of your codec. See HL7 that has a custom codec.
Sample with sync=false
In this sample, Camel exposes a service that listens for TCP connections on port 6200. We use the textline codec. In our route, we create a Mina consumer endpoint that listens on port 6200:
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As
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the
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sample
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is
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part
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of
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a
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unit
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test,
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we
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test
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it
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by
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sending
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some
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data
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to
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it
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on
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port
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6200.
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Sample
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with
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sync=true
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In
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the
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next
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sample,
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we
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have
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a
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more
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common
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use
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case
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where
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we
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expose
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a
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TCP
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service
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on
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port
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6201
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also
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use
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the
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textline
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codec.
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However,
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this
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time
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we
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want
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to
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return
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a
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response,
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so
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we
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set
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the
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sync
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option
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to
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true
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on
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the
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consumer.
...
...
Then
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we
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test
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the
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sample
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by
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sending
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some
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data
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and
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retrieving
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the
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response
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using
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the
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template.requestBody()
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method.
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As
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we
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know
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the
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response
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is
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a
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String
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,
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we
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cast
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it
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to
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String
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and
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can
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assert
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that
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the
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response
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is,
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in
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fact,
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something
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we
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have
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dynamically
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set
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in
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our
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processor
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code
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logic.
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Sample
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with
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Spring
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DSL
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Spring
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DSL
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can,
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of
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course,
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also
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be
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used
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for
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MINA.
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In
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the
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sample
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below
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we
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expose
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a
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TCP
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server
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on
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port
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5555:
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...
In the route above,
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we
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expose
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a
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TCP
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server
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on
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port
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5555
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using
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the
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textline
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codec.
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We
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let
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the
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Spring
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bean
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with
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ID,
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myTCPOrderHandler
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,
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handle
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the
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request
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and
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return
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a
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reply.
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For
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instance,
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the
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handler
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bean
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could
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be
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implemented
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as follows:
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Configuring Mina endpoints using Spring bean style
Configuration of Mina endpoints is possible using regular Spring bean style configuration in the Spring DSL.
However, in the underlying Apache Mina toolkit, it is relatively difficult to set up the acceptor and the connector, because you can not use simple setters. To resolve this difficulty, we leverage the MinaComponent
as a Spring factory bean to configure this for us. If you really need to configure this yourself, there are setters on the MinaEndpoint
to set these when needed.
The sample below shows the factory approach:
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And
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then
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we
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can
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refer
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to
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our
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endpoint
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directly
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in
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the
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route,
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as
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follows:
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Closing
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Session
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When
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Complete
When acting as a server you sometimes want to close the session when, for example, a client conversion is finished. To instruct Camel to close the session, you should add a header with the key CamelMinaCloseSessionWhenComplete
set to a boolean true
value.
For instance, the example below will close the session after it has written the bye
message back to the client:
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Get the IoSession for message
Available since Camel 2.1
You can get the IoSession from the message header with this key MinaEndpoint.HEADER_MINA_IOSESSION,
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and
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also
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get
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the
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local
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host
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address
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with
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the
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key
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MinaEndpoint.HEADER_LOCAL_ADDRESS
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and
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remote
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host
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address
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with
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the
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key
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MinaEndpoint.HEADER_REMOTE_ADDRESS.
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Configuring
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Mina
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filters
Filters permit you to use some Mina Filters, such as SslFilter
. You can also implement some customized filters. Please note that codec
and logger
are also implemented as Mina filters of type, IoFilter
. Any filters you may define are appended to the end of the filter chain; that is, after codec
and logger
.
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If using the SslFilter
you need to add the mina-filter-ssl
JAR to the classpath.
For instance, the example below will send a keep-alive message after 10 seconds of inactivity:
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As Camel Mina may use a request-reply
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scheme,
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the
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endpoint
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as
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a
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client
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would
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like
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to
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drop
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some
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message,
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such
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as
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greeting
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when
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the
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connection
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is
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established.
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For
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example,
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when
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you
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connect
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to
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an
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FTP
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server,
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you
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will
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get
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a
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220
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message
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with
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a
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greeting
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(
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220
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Welcome
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to
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Pure-FTPd
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).
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If
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you
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don't
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drop
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the
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message,
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your
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request-reply
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scheme
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will
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be
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broken.
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Then,
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you
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can
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configure
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your
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endpoint
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using
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Spring
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DSL:
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