Splunk

Since Camel 2.13

The Splunk component provides access to Splunk using the Splunk provided client api, and it enables you to publish and search for events in Splunk.

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

 <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-splunk</artifactId>
        <version>${camel-version}</version>
    </dependency>

URI format

  splunk://[endpoint]?[options]

Producer Endpoints:

Endpoint Description

stream

Streams data to a named index or the default if not specified. When using stream mode be aware of that Splunk has some internal buffer (about 1MB or so) before events gets to the index. If you need realtime, better use submit or tcp mode.

submit

submit mode. Uses Splunk rest api to publish events to a named index or the default if not specified.

tcp

tcp mode. Streams data to a tcp port, and requires a open receiver port in Splunk.

When publishing events the message body should contain a SplunkEvent.  See comment under message body.

Example

      from("direct:start").convertBodyTo(SplunkEvent.class)
          .to("splunk://submit?username=user&password=123&index=myindex&sourceType=someSourceType&source=mySource")...

In this example a converter is required to convert to a SplunkEvent class.

Consumer Endpoints:

Endpoint Description

normal

Performs normal search and requires a search query in the search option.

savedsearch

Performs search based on a search query saved in splunk and requires the name of the query in the savedSearch option.

Example

      from("splunk://normal?delay=5s&username=user&password=123&initEarliestTime=-10s&search=search index=myindex sourcetype=someSourcetype")
          .to("direct:search-result");

camel-splunk creates a route exchange per search result with a SplunkEvent in the body.

URI Options

The Splunk component supports 2 options, which are listed below.

Name Description Default Type

splunkConfiguration Factory (advanced)

To use the SplunkConfigurationFactory

SplunkConfiguration Factory

resolveProperty Placeholders (advanced)

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

boolean

The Splunk endpoint is configured using URI syntax:

splunk:name

with the following path and query parameters:

Path Parameters (1 parameters):

Name Description Default Type

name

Required Name has no purpose

String

Query Parameters (42 parameters):

Name Description Default Type

app (common)

Splunk app

String

connectionTimeout (common)

Timeout in MS when connecting to Splunk server

5000

int

host (common)

Splunk host.

localhost

String

owner (common)

Splunk owner

String

port (common)

Splunk port

8089

int

scheme (common)

Splunk scheme

https

String

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

count (consumer)

A number that indicates the maximum number of entities to return.

int

earliestTime (consumer)

Earliest time of the search time window.

String

initEarliestTime (consumer)

Initial start offset of the first search

String

latestTime (consumer)

Latest time of the search time window.

String

savedSearch (consumer)

The name of the query saved in Splunk to run

String

search (consumer)

The Splunk query to run

String

sendEmptyMessageWhenIdle (consumer)

If the polling consumer did not poll any files, you can enable this option to send an empty message (no body) instead.

false

boolean

streaming (consumer)

Sets streaming mode. Streaming mode sends exchanges as they are received, rather than in a batch.

Boolean

exceptionHandler (consumer)

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

ExceptionHandler

exchangePattern (consumer)

Sets the exchange pattern when the consumer creates an exchange.

ExchangePattern

pollStrategy (consumer)

A pluggable org.apache.camel.PollingConsumerPollingStrategy allowing you to provide your custom implementation to control error handling usually occurred during the poll operation before an Exchange have been created and being routed in Camel.

PollingConsumerPoll Strategy

eventHost (producer)

Override the default Splunk event host field

String

index (producer)

Splunk index to write to

String

raw (producer)

Should the payload be inserted raw

false

boolean

source (producer)

Splunk source argument

String

sourceType (producer)

Splunk sourcetype argument

String

tcpReceiverPort (producer)

Splunk tcp receiver port

int

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

backoffErrorThreshold (scheduler)

The number of subsequent error polls (failed due some error) that should happen before the backoffMultipler should kick-in.

int

backoffIdleThreshold (scheduler)

The number of subsequent idle polls that should happen before the backoffMultipler should kick-in.

int

backoffMultiplier (scheduler)

To let the scheduled polling consumer backoff if there has been a number of subsequent idles/errors in a row. The multiplier is then the number of polls that will be skipped before the next actual attempt is happening again. When this option is in use then backoffIdleThreshold and/or backoffErrorThreshold must also be configured.

int

delay (scheduler)

Milliseconds before the next poll. You can also specify time values using units, such as 60s (60 seconds), 5m30s (5 minutes and 30 seconds), and 1h (1 hour).

500

long

greedy (scheduler)

If greedy is enabled, then the ScheduledPollConsumer will run immediately again, if the previous run polled 1 or more messages.

false

boolean

initialDelay (scheduler)

Milliseconds before the first poll starts. You can also specify time values using units, such as 60s (60 seconds), 5m30s (5 minutes and 30 seconds), and 1h (1 hour).

1000

long

runLoggingLevel (scheduler)

The consumer logs a start/complete log line when it polls. This option allows you to configure the logging level for that.

TRACE

LoggingLevel

scheduledExecutorService (scheduler)

Allows for configuring a custom/shared thread pool to use for the consumer. By default each consumer has its own single threaded thread pool.

ScheduledExecutor Service

scheduler (scheduler)

To use a cron scheduler from either camel-spring or camel-quartz2 component

none

ScheduledPollConsumer Scheduler

schedulerProperties (scheduler)

To configure additional properties when using a custom scheduler or any of the Quartz2, Spring based scheduler.

Map

startScheduler (scheduler)

Whether the scheduler should be auto started.

true

boolean

timeUnit (scheduler)

Time unit for initialDelay and delay options.

MILLISECONDS

TimeUnit

useFixedDelay (scheduler)

Controls if fixed delay or fixed rate is used. See ScheduledExecutorService in JDK for details.

true

boolean

password (security)

Password for Splunk

String

sslProtocol (security)

Set the ssl protocol to use

TLSv1.2

SSLSecurityProtocol

username (security)

Username for Splunk

String

useSunHttpsHandler (security)

Use sun.net.www.protocol.https.Handler Https handler to establish the Splunk Connection. Can be useful when running in application servers to avoid app. server https handling.

false

boolean

Spring Boot Auto-Configuration

When using Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

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

The component supports 3 options, which are listed below.

Name Description Default Type

camel.component.splunk.enabled

Enable splunk component

true

Boolean

camel.component.splunk.resolve-property-placeholders

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

Boolean

camel.component.splunk.splunk-configuration-factory

To use the SplunkConfigurationFactory. The option is a org.apache.camel.component.splunk.SplunkConfigurationFactory type.

String

Message body

Splunk operates on data in key/value pairs. The SplunkEvent class is a placeholder for such data, and should be in the message body for the producer. Likewise it will be returned in the body per search result for the consumer.

As of Camel 2.16.0 you can send raw data to Splunk by setting the raw option on the producer endpoint. This is useful for eg. json/xml and other payloads where Splunk has build in support.

Use Cases

Search Twitter for tweets with music and publish events to Splunk

      from("twitter://search?type=polling&keywords=music&delay=10&consumerKey=abc&consumerSecret=def&accessToken=hij&accessTokenSecret=xxx")
          .convertBodyTo(SplunkEvent.class)
          .to("splunk://submit?username=foo&password=bar&index=camel-tweets&sourceType=twitter&source=music-tweets");

To convert a Tweet to a SplunkEvent you could use a converter like

@Converter
public class Tweet2SplunkEvent {
    @Converter
    public static SplunkEvent convertTweet(Status status) {
        SplunkEvent data = new SplunkEvent("twitter-message", null);
        //data.addPair("source", status.getSource());
        data.addPair("from_user", status.getUser().getScreenName());
        data.addPair("in_reply_to", status.getInReplyToScreenName());
        data.addPair(SplunkEvent.COMMON_START_TIME, status.getCreatedAt());
        data.addPair(SplunkEvent.COMMON_EVENT_ID, status.getId());
        data.addPair("text", status.getText());
        data.addPair("retweet_count", status.getRetweetCount());
        if (status.getPlace() != null) {
            data.addPair("place_country", status.getPlace().getCountry());
            data.addPair("place_name", status.getPlace().getName());
            data.addPair("place_street", status.getPlace().getStreetAddress());
        }
        if (status.getGeoLocation() != null) {
            data.addPair("geo_latitude", status.getGeoLocation().getLatitude());
            data.addPair("geo_longitude", status.getGeoLocation().getLongitude());
        }
        return data;
    }
}

Search Splunk for tweets

      from("splunk://normal?username=foo&password=bar&initEarliestTime=-2m&search=search index=camel-tweets sourcetype=twitter")
          .log("${body}");

Other comments

Splunk comes with a variety of options for leveraging machine generated data with prebuilt apps for analyzing and displaying this.

 For example the jmx app. could be used to publish jmx attributes, eg.
route and jvm metrics to Splunk, and displaying this on a dashboard.
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