...
Camel
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CouchDB
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component
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Available
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as
...
of
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Camel
...
2.11
...
The
...
couchdb:
...
component
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allows
...
you
...
to
...
treat
...
...
instances
...
as
...
a
...
producer
...
or
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consumer
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of
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messages.
...
Using
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the
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lightweight
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LightCouch
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API,
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this
...
camel
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component
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has
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the
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following
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features:
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- As
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- a
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- consumer,
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- monitors
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- couch
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- changesets
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- for
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- inserts,
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- updates
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- and
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- deletes
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- and
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- publishes
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- these
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- as
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- messages
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- into
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- camel
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- routes.
...
- As
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- a
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- producer,
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- can
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- save
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- or
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- update
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- documents
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- into
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- couch.
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- Can
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- support
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- as
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- many
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- endpoints
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- as
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- required,
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- eg
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- for
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- multiple
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- databases
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- across
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- multiple
...
- instances.
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- Ability
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- to
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- have
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- events
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- trigger
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- for
...
- only
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- deletes,
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- only
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- inserts/updates
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- or
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- all
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- (default).
...
- Headers
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- set
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- for
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- sequenceId,
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- document
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- revision,
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- document
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- id,
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- and
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- HTTP
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- method
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- type.
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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
...
pom.xml
...
for
...
this
...
component:
Code Block | ||||
---|---|---|---|---|
| ||||
{code:xml} <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-couchdb</artifactId> <version>x.x.x</version> <!-- use the same version as your Camel core version --> </dependency> {code} h3. |
URI format
Code Block |
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URI format {code} couchdb:http://hostname[:port]/database?[options] {code} Where *hostname* is the hostname |
Where hostname is the hostname of the running couchdb instance. Port is optional and if not specified then defaults to 5984.
Options
Wiki Markup |
---|
of the running couchdb instance. Port is optional and if not specified then defaults to 5984. h3. Options {div:class=confluenceTableSmall} || Property || Default || Description || | {{deletes}} | {{true}} | document deletes are published as events | | {{updates}} | {{true}} | document inserts/updates are published as events | | {{heartbeat}} | {{30000}} | how often to send an empty message to keep socket alive in millis | | {{createDatabase}} | {{true}} | create the database if it does not already exist | | {{username}} | {{null}} | username in case of authenticated databases | | {{password}} | {{null}} | password for authenticated databases | {div} h3. Headers The following headers are set on exchanges during message transport. |
Headers
The following headers are set on exchanges during message transport.
Wiki Markup |
---|
{div:class=confluenceTableSmall}
|| Property || Value ||
| {{CouchDbDatabase}} | the database the message came from |
| {{CouchDbSeq}} | the couchdb changeset sequence number of the update / delete message |
| {{CouchDbId}} | the couchdb document id |
| {{CouchDbRev}} | the couchdb document revision |
| {{CouchDbMethod}} | the method (delete / update) |
{div}
|
Headers
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are
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set
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by
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the
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consumer
...
once
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the
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message
...
is
...
received.
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The
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producer
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will
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also
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set
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the
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headers
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for
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downstream
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processors
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once
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the
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insert/update
...
has
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taken
...
place.
...
Any
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headers
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set
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prior
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to
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the
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producer
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are
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ignored.
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That
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means
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for
...
example,
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if
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you
...
set
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CouchDbId
...
as
...
a
...
header,
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it
...
will
...
not
...
be
...
used
...
as
...
the
...
id
...
for
...
insertion,
...
the
...
id
...
of
...
the
...
document
...
will
...
still
...
be
...
used.
...
Message
...
Body
...
The
...
component
...
will
...
use
...
the
...
message
...
body
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as
...
the
...
document
...
to
...
be
...
inserted.
...
If
...
the
...
body
...
is
...
an
...
instance
...
of
...
String,
...
then
...
it
...
will
...
be
...
marshalled
...
into
...
a
...
GSON
...
object
...
before
...
insert.
...
This
...
means
...
that
...
the
...
string
...
must
...
be
...
valid
...
JSON
...
or
...
the
...
insert
...
/
...
update
...
will
...
fail.
...
If
...
the
...
body
...
is
...
an
...
instance
...
of
...
a
...
com.google.gson.JsonElement
...
then
...
it
...
will
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be
...
inserted
...
as
...
is.
...
Otherwise
...
the
...
producer
...
will
...
throw
...
an
...
exception
...
of
...
unsupported
...
body
...
type.
Samples
For example if you wish to consume all inserts, updates and deletes from a CouchDB instance running locally, on port 9999 then you could use the following:
Code Block |
---|
h3. Samples For example if you wish to consume all inserts, updates and deletes from a CouchDB instance running locally, on port 9999 then you could use the following: {code} from("couchdb:http://localhost:9999").process(someProcessor); {code} |
If
...
you
...
were
...
only
...
interested
...
in
...
deletes,
...
then
...
you
...
could
...
use
...
the
...
following
Code Block |
---|
} from("couchdb:http://localhost:9999?updates=false").process(someProcessor); {code} |
If
...
you
...
wanted
...
to
...
insert
...
a
...
message
...
as
...
a
...
document,
...
then
...
the
...
body
...
of
...
the
...
exchange
...
is
...
used
Code Block |
---|
} from("someProducingEndpoint").process(someProcessor).to("couchdb:http://localhost:9999") {code} |