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Solr Component

Available as of Camel 2.9

The Solr component allows you to interface with an Apache Lucene Solr server.

Maven users will need to add the following dependency to their pom.xml for this component:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-solr</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

URI format

solr://host[:port]/solr?[options]

Operations

The following operations are currently supported. The header SolrConstants.OPERATION is required to be set to one of the following.

operation

message body value

description

INSERT

N/A

insert a new record based on headers values (headers must be prefixed with "SolrField.")

ADD_BEAN

bean instance

insert a new record based on values in an annotated bean

DELETE_BY_ID

id to delete

delete a record by ID

DELETE_BY_QUERY

query to use

delete a record by a query

COMMIT

N/A

performs a commit on any pending index changes

ROLLBACK

N/A

performs a rollback on any pending index changes

OPTIMIZE

N/A

performs a commit on any pending index changes and then runs the optimize command

Example

Below is a simple INSERT example in Java and Spring XML.

from("direct:start")
    .setHeader(SolrConstants.OPERATION, constant(SolrConstants.OPERATION_INSERT))
    .setHeader(SolrConstants.FIELD + "id", body())
    .to("solr://localhost:8983/solr");
<route>
    <from uri="direct:start"/>
    <setHeader headerName="SolrOperation">
        <constant>INSERT</constant>
    </setHeader>
    <setHeader headerName="SolrField.id">
        <simple>${body}</simple>
    </setHeader>
    <to uri="solr://localhost:8983/solr"/>
</route>

A client would simply need to pass a body message to this route as follows.

    template.sendBody("direct:start", "value1");

Querying Solr

Currently, this component doesn't support querying data (will be added later). For now, you can query Solr in a route using HTTP.

TODO: add a simple example to retrieve the data inserted above.

For more information, see these resources...

Solr Query Tutorial

Solr Query Syntax

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