Creating and Deleting MeshObjects

Creating a MeshObject

To create a MeshObject, a MeshBase must be available.

MeshBase mb = ...;

The MeshBase's MeshBaseLifecycleManager offers the creation methods. To obtain it:

MeshBaseLifecycelManager life = mb.getMeshBaseLifecycleManager();

A Transaction is necessary to create, delete or update any MeshObject.

To create a MeshObject with an automatically assigned MeshObjectIdentifier:

MeshObjectIdentifier newIdentifier = mb.getMeshObjectIdentifierFactory().fromExternalForm( "my-first-identifier" );

Transaction tx = null;
try {
    tx = mb.createTransactionAsap();

    MeshObject newObject = life.createMeshObject(); // creation
} finally {
    if( tx != null ) {
        tx.commitTransaction();
    }
}

To create a MeshObject with a specified MeshObjectIdentifier, simultaneously blessing it with EntityType org.infogrid.model.Test/AA:

Transaction tx = null;
try {
    tx = mb.createTransactionAsap();

    MeshObject newObject = life.createMeshObject(
            newIdentifier,
            TestSubjectArea.AA ); // creation
} finally {
    if( tx != null ) {
        tx.commitTransaction();
    }
}

Deleting a MeshObject

To delete a MeshObject, the MeshObject's MeshBase must be determined.

MeshObject toDelete = ...;
MeshBase   mb       = toDelete.getMeshBase();

The MeshBase's MeshBaseLifecycleManager offers the creation methods. To obtain it:

MeshBaseLifecycelManager life = mb.getMeshBaseLifecycleManager();

A Transaction is necessary to create, delete or update any MeshObject.

To delete a MeshObject:

Transaction tx = null;
try {
    tx = mb.createTransactionAsap();

    life.deleteMeshObject( toDelete ); // deletion

} finally {
    if( tx != null ) {
        tx.commitTransaction();
    }
}

Deletion of a MeshObject may have cascading delete effects.

See also:

• Creating and deleting Relationships
• Cascading delete