Chapter 235. OpenShift Component (deprecated)

Available as of Camel version 2.14

The openshift component is a component for managing your OpenShift applications. 

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

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

235.1. URI format

openshift:clientId[?options]

You can append query options to the URI in the following format, ?option=value&option=value&…​

235.2. Options

The OpenShift component supports 5 options which are listed below.

NameDescriptionDefaultType

username (security)

The username to login to openshift server.

 

String

password (security)

The password for login to openshift server.

 

String

domain (common)

Domain name. If not specified then the default domain is used.

 

String

server (common)

Url to the openshift server. If not specified then the default value from the local openshift configuration file /.openshift/express.conf is used. And if that fails as well then openshift.redhat.com is used.

 

String

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 OpenShift endpoint is configured using URI syntax:

openshift:clientId

with the following path and query parameters:

235.2.1. Path Parameters (1 parameters):

NameDescriptionDefaultType

clientId

Required The client id

 

String

235.2.2. Query Parameters (26 parameters):

NameDescriptionDefaultType

domain (common)

Domain name. If not specified then the default domain is used.

 

String

password (common)

Required The password for login to openshift server.

 

String

server (common)

Url to the openshift server. If not specified then the default value from the local openshift configuration file /.openshift/express.conf is used. And if that fails as well then openshift.redhat.com is used.

 

String

username (common)

Required The username to login to openshift server.

 

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

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

exceptionHandler (consumer)

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this options 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

application (producer)

The application name to start, stop, restart, or get the state.

 

String

mode (producer)

Whether to output the message body as a pojo or json. For pojo the message is a List type.

 

String

operation (producer)

The operation to perform which can be: list, start, stop, restart, and state. The list operation returns information about all the applications in json format. The state operation returns the state such as: started, stopped etc. The other operations does not return any value.

 

String

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

235.3. Examples

235.3.1. Listing all applications

// sending route
from("direct:apps")
    .to("openshift:myClient?username=foo&password=secret&operation=list");
    .to("log:apps");

In this case the information about all the applications is returned as pojo. If you want a json response, then set mode=json.

235.3.2. Stopping an application

// stopping the foobar application
from("direct:control")
    .to("openshift:myClient?username=foo&password=secret&operation=stop&application=foobar");
 

In the example above we stop the application named foobar.

 

Polling for gear state changes

The consumer is used for polling state changes in gears. Such as when a new gear is added/removed/ or its lifecycle is changed, eg started, or stopped etc.

// trigger when state changes on our gears
from("openshift:myClient?username=foo&password=secret&delay=30s")
    .log("Event ${header.CamelOpenShiftEventType} on application ${body.name} changed state to ${header.CamelOpenShiftEventNewState}");

 

When the consumer emits an Exchange then the body contains the com.openshift.client.IApplication as the message body. And the following headers is included.

HeaderMay be nullDescription

CamelOpenShiftEventType

No

The type of the event which can be one of: added, removed or changed.

CamelOpenShiftEventOldState

Yes

The old state, when the event type is changed.

CamelOpenShiftEventNewState

No

The new state, for any of the event types

235.4. See Also

  • Configuring Camel
  • Component
  • Endpoint
  • Getting Started