THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Krati
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Component
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Available
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as
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of
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Camel
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2.9
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This
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component
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allows
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the
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use
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krati
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datastores
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and
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datasets
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inside
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Camel.
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Krati
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is
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a
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simple
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persistent
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data
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store
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with
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very
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low
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latency
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and
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high
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throughput.
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It
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is
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designed
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for
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easy
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integration
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with
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read-write-intensive
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applications
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with
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little
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effort
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in
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tuning
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configuration,
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performance
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and
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JVM
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garbage
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collection.
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Camel
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provides
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a
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producer
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and
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consumer
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for
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krati
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datastore_(key/value
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engine)_.
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It
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also
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provides
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an
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idempotent
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repository
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for
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filtering
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out
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duplicate
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messages.
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Maven
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users
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will
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need
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to
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add
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the
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following
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dependency
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to
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their
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pom.xml
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for
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this
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component:
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{code:xml} <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-krati</artifactId> <version>x.x.x</version> <!-- use the same version as your Camel core version --> </dependency> {code} h3. URI format {code |
URI format
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} krati:[the path of the datastore][?options] {code} The *path of the datastore* is the relative path of the folder that krati will use for its datastore. You can append query options to the URI in the following format, {{ |
The path of the datastore is the relative path of the folder that krati will use for its datastore.
You can append query options to the URI in the following format, ?option=value&option=value&...
Krati URI Options
| Wiki Markup |
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}} h3. Krati URI Options {div:class=confluenceTableSmall} || Name || Default Value || Description || | {{operation}} | CamelKratiPut | *Producer Only*. Specifies the type of operation that will be performed to the datastore. Allowed values are CamelKratiPut, CamelKratiGet, CamelKratiDelete & CamelKratiDeleteAll. | | {{initialCapacity}} | 100 | The inital capcity of the store. | | {{keySerializer}} | KratiDefaultSerializer | The serializer serializer that will be used to serialize the key. | | {{valueSerializer}} | KratiDefaultSerializer | The serializer serializer that will be used to serialize the value. | | {{segmentFactory}} | ChannelSegmentFactory | The segment factory to use. Allowed instance classes: ChannelSegmentFactory,MemorySegmentFactory, MappedSegmentFactory & WriteBufferSegmentFactory. | | {{hashFunction}} | FnvHashFunction | The hash function to use. Allowed instance classes: FnvHashFunction,Fnv1Hash32,FnvHash64,Fnv1aHash32,Fnv1aHash64, JenkisHashFunction, MurmurHashFunctiom | | {{maxMessagesPerPoll}} | | *Camel 2.10.5/2.11.1:* The maximum number of messages which can be received in one poll. This can be used to avoid reading in too much data and taking up too much memory. | {div} |
You
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can
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have
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as
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many
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of
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these
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options
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as
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you
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like.
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} krati:/tmp/krati?operation=CamelKratiGet&initialCapacity=10000&keySerializer=#myCustomSerializer {code} |
For
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producer
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endpoint
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you
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can
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override
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all
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of
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the
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above
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URI
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options
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by
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passing
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the
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appropriate
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headers
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to
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the
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message.
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Message
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Headers
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for datastore
| Wiki Markup |
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datastore {div:class=confluenceTableSmall} || Header || Description || | {{CamelKratiOperation}} | The operation to be performed on the datastore. The valid options are - CamelKratiAdd - CamelKratiGet - CamelKratiDelete - CamelKratiDeleteAll | | {{CamelKratiKey}} | The key. | | {{CamelKratiValue}} | The value. | {div} h3. |
Usage
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Samples
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Example
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1:
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Putting
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to
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the
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datastore.
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This
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example
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will
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show
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you
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how
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you
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can
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store
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any
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message
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inside
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a
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datastore.
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} from("direct:put").to("krati:target/test/producertest"); {code} |
In
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the
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above
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example
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you
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can
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override
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any
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of
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the
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URI
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parameters
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with
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headers
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on
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the
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message.
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Here
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is
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how
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the
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above
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example
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would
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look
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like
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using
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xml
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to
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define
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our
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route.
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{code:xml} <route> <from uri="direct:put"/> <to uri="krati:target/test/producerspringtest"/> </route> {code} h4. Example |
Example 2:
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Getting/Reading
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from
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a
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datastore
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This
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example
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will
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show
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you
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how
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you
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can
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read
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the
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contnet
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of
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a
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datastore.
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} from("direct:get") .setHeader(KratiConstants.KRATI_OPERATION, constant(KratiConstants.KRATI_OPERATION_GET)) .to("krati:target/test/producertest"); {code} |
In
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the
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above
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example
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you
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can
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override
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any
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of
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the
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URI
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parameters
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with
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headers
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on
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the
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message.
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Here
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is
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how
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the
...
above
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example
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would
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look
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like
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using
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xml
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to
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define
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our
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route.
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{code:xml} <route> <from uri="direct:get"/> <to uri="krati:target/test/producerspringtest?operation=CamelKratiGet"/> </route> {code} h4. Example |
Example 3:
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Consuming
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from
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a
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datastore
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This
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example
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will
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consume
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all
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items
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that
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are
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under
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the
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specified
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datastore.
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} from("krati:target/test/consumertest") .to("direct:next"); {code} |
You
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can
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achieve
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the
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same
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goal
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by
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using
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xml,
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as
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you
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can
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see
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below.
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{code:xml}
<route>
<from uri="krati:target/test/consumerspringtest"/>
<to uri="mock:results"/>
</route>
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Idempotent Repository
As already mentioned this component also offers and idemptonet repository which can be used for filtering out duplicate messages.
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{code} h3. Idempotent Repository As already mentioned this component also offers and idemptonet repository which can be used for filtering out duplicate messages. {code} from("direct://in").idempotentConsumer(header("messageId"), new KratiIdempotentRepositroy("/tmp/idempotent").to("log://out"); {code} h4. See also [Krati Websitre|http://sna-projects.com/krati/] |