Examples of org.infinispan.marshall.core.MarshalledValue$Externalizer

org.infinispan.marshall.core.MarshalledValue
Wrapper that wraps cached data, providing lazy deserialization using the calling thread's context class loader.
The {@link org.infinispan.interceptors.MarshalledValueInterceptor} handles transparent wrapping/unwrapping of cacheddata.
NOTE: the equals() method of this class will compare binary representations (byte arrays).
Note also that this will affect the way keys stored in the cache will work, if storeAsBinary is used, since comparisons happen on the key which will be wrapped by a {@link MarshalledValue}. Implementers of equals() methods of their keys need to be aware of this.
This class can be marshalled either via its externalizer or via the JVM serialization. The reason for supporting both methods is to enable third-party libraries to be able to marshall/unmarshall them using standard JVM serialization rules. The Infinispan marshalling layer will always chose the most performant one, aka the externalizer method. @author Manik Surtani (manik@jboss.org) @author Mircea.Markus@jboss.com @author Galder Zamarreño @author Sanne Grinovero @see org.infinispan.interceptors.MarshalledValueInterceptor @since 4.0


      assert null == cl.load("k1");
   }


   public void testLoadAndStoreMarshalledValues() throws PersistenceException {
      MarshalledValue key = new MarshalledValue(new Pojo().role("key"), getMarshaller());
      MarshalledValue key2 = new MarshalledValue(new Pojo().role("key2"), getMarshaller());
      MarshalledValue value = new MarshalledValue(new Pojo().role("value"), getMarshaller());


      assertFalse(cl.contains(key));
      cl.write(new MarshalledEntryImpl(key, value, null, getMarshaller()));


      assertEquals(value, cl.load(key).getValue());

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   }


   public void testLoadAndStoreMarshalledValues() throws PersistenceException {
      assertIsEmpty();


      MarshalledValue key = new MarshalledValue(new Pojo().role("key"), getMarshaller());
      MarshalledValue key2 = new MarshalledValue(new Pojo().role("key2"), getMarshaller());
      MarshalledValue value = new MarshalledValue(new Pojo().role("value"), getMarshaller());


      assertFalse(cl.contains(key));
      cl.write(new MarshalledEntryImpl<Object, Object>(key, value, null, getMarshaller()));


      assertEquals(value, cl.load(key).getValue());

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   }


   public void testMarshalledValueMarshalling() throws Exception {
      Person p = new Person();
      p.setName("Bob Dylan");
      MarshalledValue mv = new MarshalledValue(p, marshaller);
      marshallAndAssertEquality(mv);
   }

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      marshallAndAssertEquality(mv);
   }


   public void testMarshalledValueGetMarshalling() throws Exception {
      Pojo ext = new Pojo();
      MarshalledValue mv = new MarshalledValue(ext, marshaller);
      byte[] bytes = marshaller.objectToByteBuffer(mv);
      MarshalledValue rmv = (MarshalledValue) marshaller.objectFromByteBuffer(bytes);
      assert rmv.equals(mv) : "Writen[" + mv + "] and read[" + rmv + "] objects should be the same";
      assert rmv.get() instanceof Pojo;
   }

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      assert null == cl.load("k1");
   }


   public void testLoadAndStoreMarshalledValues() throws PersistenceException {
      MarshalledValue key = new MarshalledValue(new Pojo().role("key"), getMarshaller());
      MarshalledValue key2 = new MarshalledValue(new Pojo().role("key2"), getMarshaller());
      MarshalledValue value = new MarshalledValue(new Pojo().role("value"), getMarshaller());


      assertFalse(cl.contains(key));
      cl.write(new MarshalledEntryImpl(key, value, null, getMarshaller()));


      assert cl.load(key).getValue().equals(value);

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   }


   public void testMarshalledValueMarshalling() throws Exception {
      Person p = new Person();
      p.setName("Bob Dylan");
      MarshalledValue mv = new MarshalledValue(p, marshaller);
      marshallAndAssertEquality(mv);
   }

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      marshallAndAssertEquality(mv);
   }


   public void testMarshalledValueGetMarshalling() throws Exception {
      Pojo ext = new Pojo();
      MarshalledValue mv = new MarshalledValue(ext, marshaller);
      byte[] bytes = marshaller.objectToByteBuffer(mv);
      MarshalledValue rmv = (MarshalledValue) marshaller.objectFromByteBuffer(bytes);
      assert rmv.equals(mv) : "Writen[" + mv + "] and read[" + rmv + "] objects should be the same";
      assert rmv.get() instanceof Pojo;
   }

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         // Use our parent
         return super.getStringMapping(key);
      } else {
         // Do it ourself
         try {
            MarshalledValue mv = (MarshalledValue) key;
            String serializedObj = serializeObj(mv);
            return serializedObj;
         } catch (Exception ex) {
            throw new IllegalArgumentException("Exception occurred serializing key.", ex);
         }

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         return super.getKeyMapping(key);
      } else {
         // Do it ourself
         try {
            Object obj = deserializeObj(key);
            MarshalledValue mv = (MarshalledValue) obj;
            return mv;
         } catch (Exception ex) {
            throw new IllegalArgumentException("Exception occurred deserializing key.", ex);
         }
      }

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   private MarshalledValue deserializeObj(String key) throws Exception {
      if(externalizer==null)
         throw new IllegalStateException("Cannot deserialize object: undefined marshaller");
      byte[] data = Base64.decode(key);
      ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(data));
      MarshalledValue mv = externalizer.readObject(ois);
      ois.close();
      return mv;
   }

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