7. Changelog
The changelog describes in plain English the changes that occurred between Py4J releases. Please look at the roadmap for more detailed information.
7.1. Py4J 0.4
- Polishing of existing features: fields can be set (not just read), None is accepted as a method parameter, methods are sorted alhabetically in gateway.help(), etc.
- Java Exception Stack Trace are now propagated to Python side.
- Changed interfaces member in Callback classes to implements.
- Internal refactoring to adopt clearer terminology and make Py4J protocol extensible.
- Many bug fixes: most are related to the callback feature.
- Trac 0.4 milestone
7.2. Py4J 0.3
- Added support for Java arrays and set.
- Added support for callbacks: Java objects can now call back Python objects.
- Completely redesigned threading and connection model of Py4J to allow multiple threads and callbacks on both side.
- Refactored the memory management to ensure best effort garbage collection.
- Trac 0.3 milestone
7.3. Py4J 0.2
- It is now possible to call constructors and reference static members: use the jvm member of a JavaGateway object.
- Java Map is converted to a Python Dictionary.
- Field access is supported through the get_field function or the auto_field=True member of JavaGateway.
- Obtain an interactive help page with JavaGateway.help(object).
- Set is only accessible through the Java Set interface for now.
- Arrays can be referenced, but individual items can only be accessed with this workaround: gateway.jvm.java.lang.reflect.Array.get(object,index).
- Complete rewrite of the reflection engine on the Java side for more flexibility.
- Improved memory model: no more memory leak caused by Py4J.
- New concurrency model: Py4J is now thread-safe.
- Trac 0.2 milestone
7.4. Py4J 0.1
- This is the first release.
- Basic features like connecting to a JVM and calling methods are implemented.
- Java List is converted to a Python List.
- Field access, constructors, and static classes are NOT accessible yet.
- Dictionary and Set are only accessible through the Java Map and Set interface for now.
- Arrays can be referenced, but individual items cannot be accessed yet.
- Trac 0.1 milestone