org.springframework.amqp.support.converter.MessageConversionException Java Examples

@Override
public Object fromMessage(Message message) throws MessageConversionException {
	System.err.println("-----------Image MessageConverter----------");
	
	Object _extName = message.getMessageProperties().getHeaders().get("extName");
	String extName = _extName == null ? "png" : _extName.toString();
	
	byte[] body = message.getBody();
	String fileName = UUID.randomUUID().toString();
	String path = "d:/010_test/" + fileName + "." + extName;
	File f = new File(path);
	try {
		Files.copy(new ByteArrayInputStream(body), f.toPath());
	} catch (IOException e) {
		e.printStackTrace();
	}
	return f;
}
 

@Override
public Message toMessage(Object obj, MessageProperties messageProperties) throws MessageConversionException {
    String messageType = obj.getClass().getSimpleName();
    Codec<Object> codec = codecMap.get(messageType);
    if (codec == null) {
        throw new MessageConversionException("不支持转换的消息类型:" + messageType);
    }
    messageProperties.setHeader("messageType", messageType);
    byte[] body;
    try {
        body = codec.encode(obj);
    } catch (Exception e) {
        throw new MessageConversionException("编码失败:" + messageType, e);
    }
    return new Message(body, messageProperties);
}
 

@Override
public Object fromMessage(Message message) throws MessageConversionException {
	String contentType = message.getMessageProperties().getContentType();
	// testSendMessage4Text
	if(null != contentType && contentType.contains("text")) {
		return new String(message.getBody());
	}
	return message.getBody();
}
 

@Override
public Object fromMessage(Message message) throws MessageConversionException {
	System.err.println("-----------PDF MessageConverter----------");
	
	byte[] body = message.getBody();
	String fileName = UUID.randomUUID().toString();
	String path = "d:/010_test/" + fileName + ".pdf";
	File f = new File(path);
	try {
		Files.copy(new ByteArrayInputStream(body), f.toPath());
	} catch (IOException e) {
		e.printStackTrace();
	}
	return f;
}
 

@Override
public Object fromMessage(Message message) throws MessageConversionException {
    String messageType = message.getMessageProperties().getHeaders().get("messageType").toString();
    Codec<Object> codec = codecMap.get(messageType);
    if (codec == null) {
        throw new MessageConversionException("不支持转换的消息类型:" + messageType);
    }
    Object obj;
    try {
        obj = codec.decode(message.getBody());
    } catch (Exception e) {
        throw new MessageConversionException("解码失败:" + messageType, e);
    }
    return obj;
}
 

@Test
@Description("Tests not allowed body in message")
public void createThingWithWrongBody() {
    final String knownThingId = "3";

    assertThatExceptionOfType(MessageConversionException.class)
            .as("MessageConversionException was excepeted due to wrong body")
            .isThrownBy(() -> amqpMessageHandlerService.onMessage(
                    createMessage("Not allowed Body".getBytes(), getThingCreatedMessageProperties(knownThingId)),
                    MessageType.THING_CREATED.name(), TENANT, VIRTUAL_HOST));
}
 

@Test
@Description("Tests invalid null message content")
@ExpectEvents({ @Expect(type = TargetCreatedEvent.class, count = 0) })
public void convertMessageWithNullContent() {
    try {
        baseAmqpService.convertMessage(new Message(null, createJsonProperties()), DmfActionUpdateStatus.class);
        fail("Expected MessageConversionException for inavlid JSON");
    } catch (final MessageConversionException e) {
        // expected
    }

}
 

@Test
@Description("Tests invalid empty message content")
@ExpectEvents({ @Expect(type = TargetCreatedEvent.class, count = 0) })
public void updateActionStatusWithEmptyContent() {
    try {
        baseAmqpService.convertMessage(new Message("".getBytes(), createJsonProperties()),
                DmfActionUpdateStatus.class);
        fail("Expected MessageConversionException for inavlid JSON");
    } catch (final MessageConversionException e) {
        // expected
    }
}
 

@Test
@Description("Tests invalid json message content")
@ExpectEvents({ @Expect(type = TargetCreatedEvent.class, count = 0) })
public void updateActionStatusWithInvalidJsonContent() {
    try {
        baseAmqpService.convertMessage(new Message("Invalid Json".getBytes(), createJsonProperties()),
                DmfActionUpdateStatus.class);
        fail("Expected MessageConversionException for inavlid JSON");
    } catch (final MessageConversionException e) {
        // expected
    }
}
 

@Override
public Message toMessage(Object object, MessageProperties messageProperties) throws MessageConversionException {
	throw new MessageConversionException(" convert error ! ");
}
 

@Override
public Message toMessage(Object object, MessageProperties messageProperties) throws MessageConversionException {
	return new Message(object.toString().getBytes(), messageProperties);
}
 

@Override
public Message toMessage(Object object, MessageProperties messageProperties) throws MessageConversionException {
	throw new MessageConversionException(" convert error ! ");
}
 

@Override
public Object fromMessage(Message message) throws MessageConversionException {
	return message.getBody();
}
 

protected void checkMessageBody(@NotNull final Message message) {
    if (isMessageBodyEmpty(message)) {
        throw new MessageConversionException("Message body cannot be null");
    }
}
 

private static boolean isMessageException(final Throwable cause) {
    return cause instanceof InvalidTargetAddressException || cause instanceof MessageConversionException
            || cause instanceof MessageHandlingException;
}