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https://github.com/protostuff/protostuff

Java serialization library, proto compiler, code generator
https://github.com/protostuff/protostuff

graph java json protobuf protostuff serialization

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Java serialization library, proto compiler, code generator

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README

        

![Protostuff](https://protostuff.github.io/images/protostuff_300x100.png)

A java serialization library with built-in support for forward-backward compatibility (schema evolution) and validation.

- **efficient**, both in speed and memory
- **flexible**, supporting pluggable formats

### Usecase
- messaging layer in RPC
- storage format in the datastore or cache

For more information, go to https://protostuff.github.io/docs/

## Maven

1. For the core formats (protostuff, protobuf, graph)

```xml

io.protostuff
protostuff-core
1.7.4

```

2. For schemas generated at runtime

```xml

io.protostuff
protostuff-runtime
1.7.4

```

## Usage
```java
public final class Foo
{
String name;
int id;

public Foo(String name, int id)
{
this.name = name;
this.id = id;
}
}

static void roundTrip()
{
Foo foo = new Foo("foo", 1);

// this is lazily created and cached by RuntimeSchema
// so its safe to call RuntimeSchema.getSchema(Foo.class) over and over
// The getSchema method is also thread-safe
Schema schema = RuntimeSchema.getSchema(Foo.class);

// Re-use (manage) this buffer to avoid allocating on every serialization
LinkedBuffer buffer = LinkedBuffer.allocate(512);

// ser
final byte[] protostuff;
try
{
protostuff = ProtostuffIOUtil.toByteArray(foo, schema, buffer);
}
finally
{
buffer.clear();
}

// deser
Foo fooParsed = schema.newMessage();
ProtostuffIOUtil.mergeFrom(protostuff, fooParsed, schema);
}
```

## Important (for version 1.8.x)
If you are to purely use this to replace java serialization (no compatibility with protobuf), set the following system properties:
```
-Dprotostuff.runtime.always_use_sun_reflection_factory=true
-Dprotostuff.runtime.preserve_null_elements=true
-Dprotostuff.runtime.morph_collection_interfaces=true
-Dprotostuff.runtime.morph_map_interfaces=true
-Dprotostuff.runtime.morph_non_final_pojos=true
```

You can also customize it programmatically:
```java
static final DefaultIdStrategy STRATEGY = new DefaultIdStrategy(IdStrategy.DEFAULT_FLAGS
| IdStrategy.PRESERVE_NULL_ELEMENTS
| IdStrategy.MORPH_COLLECTION_INTERFACES
| IdStrategy.MORPH_MAP_INTERFACES
| IdStrategy.MORPH_NON_FINAL_POJOS);
```

Use it:
```java
Schema schema = RuntimeSchema.getSchema(Foo.class, STRATEGY);
```

Questions/Concerns/Suggestions
------------------------------

- subscribe to http://groups.google.com/group/protostuff/

Requirements
------------

Java 1.6 or higher

Build Requirements
------------------

Maven 3.2.3 or higher

Developing with eclipse
------------------
```sh
mvn install && mvn eclipse:eclipse
# Open eclipse, import existing project, navigate to the protostuff module you're after, then hit 'Finish'.
```