Examples of com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException

com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException
Exception that will be passed to the {@link AsyncCallback#onFailure(Throwable)} method when an incompatibility isdetected between a {@link RemoteService} client and its corresponding{@link RemoteService} server.
The correct response to receiving an instance of this exception in the {@link AsyncCallback#onFailure(Throwable)} method is to get the applicationinto a state where a browser refresh can be done.

This exception can be caused by the following problems:
- The requested {@link RemoteService} cannot be located via{@link Class#forName(String)} on the server.
- The requested {@link RemoteService} interface is not implemented by the{@link com.google.gwt.user.server.rpc.RemoteServiceServlet RemoteServiceServlet}instance which is configured to process the request.
- The requested service method is not defined or inherited by the requested {@link RemoteService} interface.
- One of the types used in the {@link RemoteService} method invocation hashad fields added or removed.
- The client code receives a type from the server which it cannot deserialize.
Note that on the client, the {@link #getCause()} always returnnull.

      while (idx < encodedTokens.length()
          && Character.isDigit(encodedTokens.charAt(idx))) {
        ++idx;
      }
      if (idx == 0) {
        throw new IncompatibleRemoteServiceException(
            "Malformed or old RPC message received - expecting version between "
                + SERIALIZATION_STREAM_MIN_VERSION + " and "
                + SERIALIZATION_STREAM_VERSION);
      } else {
        int version = Integer.valueOf(encodedTokens.substring(0, idx));
        throw new IncompatibleRemoteServiceException("Expecting version between "
            + SERIALIZATION_STREAM_MIN_VERSION + " and "
            + SERIALIZATION_STREAM_VERSION + " from client, got " + version
            + ".");
      }
    }


    super.prepareToRead(encodedTokens);


    // Check the RPC version number sent by the client
    if (getVersion() < SERIALIZATION_STREAM_MIN_VERSION
        || getVersion() > SERIALIZATION_STREAM_VERSION) {
      throw new IncompatibleRemoteServiceException("Expecting version between "
          + SERIALIZATION_STREAM_MIN_VERSION + " and "
          + SERIALIZATION_STREAM_VERSION + " from client, got " + getVersion()
          + ".");
    }
    
    // Check the flags
    if (!areFlagsValid()) {
      throw new IncompatibleRemoteServiceException("Got an unknown flag from "
          + "client: " + getFlags());
    }


    // Read the type name table
    deserializeStringTable();

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    @Override
    public void endVisit(EnumValueCommand x, Context ctx) {
      String fieldName = clientOracle.getFieldId(x.getValue());
      if (fieldName == null) {
        throw new IncompatibleRemoteServiceException(
            "The client cannot accept " + x.getValue().name());
      }
      String clinitName = clientOracle.getMethodId(
          x.getValue().getDeclaringClass(), "$clinit");
      assert clinitName != null;

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      byte[] currentBackRef = begin(x);
      byte[] constructorFunction = constructorFunction(x);
      String seedName = clientOracle.getSeedName(x.getTargetClass());


      if (seedName == null) {
        throw new IncompatibleRemoteServiceException(
            "The client cannot create type " + x.getTargetClass());
      }


      /*
       * If we need to maintain a backreference to the object, it's established

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      String fieldName = clientOracle.getFieldId(x.getFieldDeclClass(),
          x.getField());


      if (fieldName == null) {
        // TODO: What does it mean if the client doesn't have a field?
        throw new IncompatibleRemoteServiceException(
            "The client does not have field " + x.getField() + " in type "
                + x.getFieldDeclClass().getName());
      }


      // i[3].foo = bar

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