paging_predicate_sample

Paging Predicate Example with Sorting

In this example you will learn how you can use a paging predicate with sorting. In order to define how sorting will work, you need a comparator. In order a member to know this comparator, you need to register the comparator in the member config. The following describes how to do it:

You can use the sample project in main folder:

1. Run the Main class. The started member will already have the Comparator class registered.
2. Run the sample code in main.js via node main.js.

Alternatively, you can start from scratch:

1. Download Hazelcast. Extract it somewhere. https://hazelcast.com/get-started/download/
2. To add a custom comparator you need to compile and add it to Hazelcast classpath.
3. In order to compile use a Java project that includes Hazelcast as a dependency, you can use an IDE like Intellij IDEA for simplicity. Just open the IDE and press build button, then the classes will be in target folder. The Java project used is in the main folder.
4. Put compiled Java classes inside bin/user-lib in extracted Hazelcast folder. By default, the Hazelcast member will look for classes inside bin/user-lib directory. In other words that directory is in member's CLASSPATH.
5. You can also find the compiled classes in user-lib folder in this folder in case you need them.
6. Register identified data serializable in bin/hazelcast.xml config. There is a hazelcast.xml you can copy, or just copy the related part in serialization config.
7. Navigate to folder that you extracted Hazelcast to.
8. Run chmod +x bin/start.sh if the file is not executable.
9. Run Hazelcast with bin/start.sh.
10. Run the sample code in main.js via node main.js.