55 lines
2.6 KiB
Markdown
55 lines
2.6 KiB
Markdown
Odd Even Sample
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===============
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This project contains the following 2 sample applications:
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* CronOddEvenDemo
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* IntervalOddEvenDemoTestApp
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## CronOddEvenDemo
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This example demonstrates the following aspects of the core Enterprise Integration Patterns (EIP) support available with Spring Integration:
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* Inbound Channel Adapter
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* Poller with Cron Trigger
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* Filter
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* Router (SpEL based)
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* Service Activator
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Messages are simply being emitted by the **Poller** (**Cron-based**) through triggering the **next()** method of the *org.springframework.integration.samples.oddeven.Counter* class. Every 5th number generated by the **Counter** class will be negative. The messages are sent via the **numbers** channel to a *Spring Expression Language* (SpEL) based **Message Filter**. The filter discards any messages that contain a payload whose value is less than the number one (1).
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Via the **positives** channel messages are sent to the a SpEL expression-based router. All that the router does is to simply route messages to one of the following two **Service Activators**:
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* OddLogger
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* EvenLogger
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## IntervalOddEvenDemoTestApp
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Demonstrates a method-invoking **Inbound Channel Adapter** acting as a **Polling Consumer** with an **Interval-based trigger**. That adapter is followed, downstream, by a Content Based **Router**. The router sends to one of two channels based on whether the payload number is odd or even. Each of those two channels has an **Event Driven Consumer** ready to log the number and the current time.
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The following Spring Integration components are being used:
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* Inbound Channel Adapter
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* Poller with Fixed Delay Trigger
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* Router (SpEL based)
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* Service Activator
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## Running the Samples
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To run the two samples, simply execute either **CronOddEvenDemo** or **IntervalOddEvenDemoTestApp** in package **org.springframework.integration.samples.oddeven**.
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You can also execute those two samples using the [Gradle Application Plugin](http://www.gradle.org/docs/current/userguide/application_plugin.html):
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$ gradlew :oddeven:runCronOddEvenDemo
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which will execute **CronOddEvenDemo**. In order to run **IntervalOddEvenDemoTestApp**, execute:
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$ gradlew :oddeven:runIntervalOddEvenDemoTestApp
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For both samples you should see the output similar to this:
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INFO : org.springframework.integration.samples.oddeven.OddLogger - odd: 1 at 2012-02-10 03:29:32
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INFO : org.springframework.integration.samples.oddeven.EvenLogger - even: 2 at 2012-02-10 03:29:35
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INFO : org.springframework.integration.samples.oddeven.OddLogger - odd: 3 at 2012-02-10 03:29:38
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INFO : org.springframework.integration.samples.oddeven.EvenLogger - even: 4 at 2012-02-10 03:29:41
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