Examples of org.switchyard.Exchange

org.switchyard.Exchange
An Exchange represents an instance of a service invocation with a specific message exchange pattern (e.g. InOnly, InOut). Exchange provides a conduit for the messages that flow into and out of a service as part of a service invocation. Unlike messages, an exchange cannot be copied and reused across service invocations. State associated with an invocation (i.e. context) is maintained at the exchange level.

    }
    
    @Test
    public void testPhaseIsInAfterInputMessage() {
        ServiceReference service = _domain.createInOnlyService(new QName("InPhase"));
        Exchange exchange = service.createExchange();
        exchange.send(exchange.createMessage());
        Assert.assertEquals(ExchangePhase.IN, exchange.getPhase());
    }

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    @Test
    public void testPhaseIsOutAfterOutputMessage() {
        MockHandler replyHandler = new MockHandler();
        ServiceReference service = _domain.createInOutService(
                new QName("OutPhase"), new MockHandler().forwardInToOut());
        Exchange exchange = service.createExchange(replyHandler);
        exchange.send(exchange.createMessage());
        replyHandler.waitForOKMessage();
        Assert.assertEquals(ExchangePhase.OUT, exchange.getPhase());
    }

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    @Test
    public void testPhaseIsOutAfterFaultMessage() {
        MockHandler replyHandler = new MockHandler();
        ServiceReference service = _domain.createInOutService(
                new QName("FaultPhase"), new MockHandler().forwardInToFault());
        Exchange exchange = service.createExchange(replyHandler);
        exchange.send(exchange.createMessage());
        replyHandler.waitForFaultMessage();
        Assert.assertEquals(ExchangePhase.OUT, exchange.getPhase());
    }

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    }
    
    @Test
    public void testMessageIdSetOnSend() {
        ServiceReference service = _domain.createInOnlyService(new QName("IdTest"));
        Exchange exchange = service.createExchange();
        exchange.send(exchange.createMessage());
        Assert.assertNotNull(exchange.getMessage().getContext().getProperty(Exchange.MESSAGE_ID));
    }

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    @Test
    public void testRelatesToSetOnReply() {
        ServiceReference service = _domain.createInOutService(
            new QName("ReplyTest"), new MockHandler().forwardInToOut());
        MockHandler replyHandler = new MockHandler();
        Exchange exchange = service.createExchange(replyHandler);
        Message message = exchange.createMessage();
        exchange.send(message);


        String requestId = message.getContext().getPropertyValue(Exchange.MESSAGE_ID);
        String replyId = exchange.getMessage().getContext().getPropertyValue(Exchange.MESSAGE_ID);
        String replyRelatesTo = exchange.getMessage().getContext().getPropertyValue(Exchange.RELATES_TO);


        Assert.assertEquals(requestId, replyRelatesTo);
        Assert.assertFalse(requestId.equals(replyId));
    }

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        Assert.assertFalse(requestId.equals(replyId));
    }


    @Test
    public void testNullSend() {
        Exchange exchange = new ExchangeImpl(_domain, _dispatch);
        try {
            exchange.send(null);
            Assert.fail("Expected IllegalArgumentException.");
        } catch (IllegalArgumentException e) {
          boolean messageMatch = e.getMessage().contains("SWITCHYARD014019");
            Assert.assertTrue(messageMatch);
        }

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        }
    }


    @Test
    public void testNullSendFault() {
        Exchange exchange = new ExchangeImpl(_domain, _dispatch);
        try {
            exchange.sendFault(null);
            Assert.fail("Expected IllegalArgumentException.");
        } catch (IllegalArgumentException e) {
          boolean messageMatch = e.getMessage().contains("SWITCHYARD014019");
          Assert.assertTrue(messageMatch);
        }

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        EventCounter counter = new EventCounter();
        _domain.addEventObserver(counter, ExchangeInitiatedEvent.class);
        
        // send in-only and check the count
        ServiceReference inOnlyService = _domain.createInOnlyService(new QName("ExchangeInitiatedEvent-1"));
        Exchange inOnly = inOnlyService.createExchange();
        inOnly.send(inOnly.createMessage());
        Assert.assertEquals(1, counter.initiatedCount);
        
        // reset count
        counter.initiatedCount = 0;
        
        // send in-out and check the count
        ServiceReference inOutService = _domain.createInOutService(
                new QName("ExchangeInitiatedEvent-2"), new MockHandler().forwardInToOut());
        Exchange inOut = inOutService.createExchange(new MockHandler());
        inOut.send(inOut.createMessage());
        Assert.assertEquals(1, counter.initiatedCount);
    }

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        EventCounter counter = new EventCounter();
        _domain.addEventObserver(counter, ExchangeCompletionEvent.class);
        
        // send in-only and check the count
        ServiceReference inOnlyService = _domain.createInOnlyService(new QName("ExchangeCompleteEvent-1"));
        Exchange inOnly = inOnlyService.createExchange();
        inOnly.send(inOnly.createMessage());
        Assert.assertEquals(1, counter.completedCount);
        
        // reset count
        counter.completedCount = 0;
        
        // send in-out and check the count
        ServiceReference inOutService = _domain.createInOutService(
                new QName("ExchangeCompleteEvent-2"), new MockHandler().forwardInToOut());
        Exchange inOut = inOutService.createExchange(new MockHandler());
        inOut.send(inOut.createMessage());
        Assert.assertEquals(1, counter.completedCount);
    }

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        _domain.addEventObserver(counter, ExchangeCompletionEvent.class);
        
        // send 10 in-only messages and check the counters
        for (int i = 0; i < 10; i++) {
            ServiceReference inOnlyService = _domain.createInOnlyService(new QName("ExchangeEvent-0" + i));
            Exchange inOnly = inOnlyService.createExchange();
            inOnly.send(inOnly.createMessage());
        }
        
        Assert.assertEquals(10, counter.initiatedCount);
        Assert.assertEquals(10, counter.completedCount);
        
        // initialize counters
        counter.initiatedCount = 0;
        counter.completedCount = 0;
        
        // send 10 in-out and check the count
        for (int i = 0; i < 10; i++) {
            ServiceReference inOutService = _domain.createInOutService(
                    new QName("ExchangeEvent-1" + i), new MockHandler().forwardInToOut());
            Exchange inOut = inOutService.createExchange(new MockHandler());
            inOut.send(inOut.createMessage());
        }
        
        Assert.assertEquals(10, counter.initiatedCount);
        Assert.assertEquals(10, counter.completedCount);
    }

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