Getting started

To start using PackRat library, you need to take following simple steps:

Put lib packer.jar into application classpath.

Define by annotations (see Compression Schema Description) what fields will be compressed, indexed or left as is.

import org.openspaces.packrat.annotations.*

@CompressedClass(type = "entry")
public class ExamplePojo {

    @IndexField
    private Integer name;

    private Integer integerValue;

    @CompressedField
    private Double doubleValue;
    // ...................................

It is common practive to store all your domain POJOs in one package

Run code generator for package with target POJOs
```
PackageGenerator packageGenerator = new PackageGenerator();
packageGenerator.generate("org.openspaces.packrat.example");
```
This will generate and write code for Packer and Packed objects into the working directory (will be fixed shortly).
Put newly generated files (in this example ExamplePojoPacked.java, ExamplePojoPacker.java) into package of your choice.

Start using it!

Packer packer = new Packer();

  IJSpace space = (IJSpace) SpaceFinder.find("jini://*/*/mySpace");

  ExamplePojo example = new ExamplePojo();

  pojo.setId(12);
  pojo.setBoolValue(true);
  pojo.setIntegerValue(12);
  // ...................................

  //write packed entry to space
  space.write(packer.pack(example), null, Lease.FOREVER);

  //search pojo by template
  ExamplePojo template = new ExamplePojo();
  Entry[] entries = space.readMultiple(packer.packForTemplate(template), null, 1000);
  for(Entry entry:entries){
      ExamplePojo res = packer.unpack(entry);
  }

Enjoy reduced footprint of your POJOs!