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Last modified by Danniar Firdausy on 2024/09/04 10:26
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edited by Erik Bakker
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Change comment: Deleted image "novice-devops-perspectives-annotations--describe-parts-of-flow.png"
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edited by Erik Bakker
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1 -Annotations
1 +Calling a SOAP Web service
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1 -{{container}}{{container layoutStyle="columns"}}(((
2 -In this microlearning, we will focus on using annotations to clarify your thought process. In the annotation, you either describe a best practice everyone should follow when they change that flow (i.e. within the asynchronous routing), describe how the (more complex) parts of the flow work or describe (parts of) of your message definitions (i.e. CDM, API Gateway Data model, system message, etc.). This will help yourself and others every time changes are needed.
1 +{{container}}{{container layoutStyle="columns"}}(((
2 +When talking to external parties via a SOAP web service you need to define in eMagiz that you want to call a SOAP web service so eMagiz will form a correct SOAP message. On top of the call there is a support object in eMagiz that will help you with the analysis of your problems when calling the SOAP web service. In this microlearning, we will learn how to call a SOAP web service from eMagiz.
3 3  
4 -Should you have any questions, please contact [[academy@emagiz.com>>mailto:academy@emagiz.com]].
4 +Should you have any questions, please contact academy@emagiz.com.
5 5  
6 -* Last update: May 9th, 2021
6 +* Last update: April 1st, 2022
7 7  * Required reading time: 5 minutes
8 8  
9 9  == 1. Prerequisites ==
10 -
11 11  * Basic knowledge of the eMagiz platform
12 12  
13 13  == 2. Key concepts ==
13 +This microlearning centers around calling a SOAP Webservice.
14 14  
15 -This microlearning centers around using annotations.
16 -With annotations, we mean: A piece of text to explain something to yourself and others
15 +With SOAP, we mean: A messaging protocol specification for exchanging structured information in the implementation of web services in computer networks.
17 17  
18 -Annotations can be used for:
17 +* To call a REST Webservice you need either:
18 + ** A Web Service Outbound Gateway
19 +* Critical information when configuring this component:
20 + ** URL
21 + ** Retry Advice
22 + ** Error Handling
23 + ** Authentication
24 +
25 +== 3. Calling a SOAP Webservice ==
19 19  
20 -* Describing a best practice everyone should follow
21 -* Describing (more complex) parts of the flow
22 -* Describe (parts of) your message definitions
27 +When talking to external parties via a SOAP web service you need to define in eMagiz that you want to call a SOAP web service so eMagiz will form a correct SOAP message. On top of the call there is a support object in eMagiz that will help you with the analysis of your problems when calling the SOAP web service. In this microlearning, we will learn how to call a SOAP web service from eMagiz.
23 23  
24 -== 3. Annotations ==
29 +Calling a SOAP Webservice within eMagiz can be done with the help of a Web Service Outbound Gateway. To correctly configure this component you need to consider the following elements:
25 25  
26 -In this microlearning, we will focus on using annotations on the flow level to clarify our thought process. In the annotation, you either describe a best practice everyone should follow when they change that flow (i.e. within the asynchronous routing) or describe how the (more complex) parts of the flow work. This will help yourself and others every time changes are needed within the flow.
31 +* URL
32 +* Retry Advice
33 +* Error Handling
34 +* Authentication
27 27  
28 -Annotations can be used for:
36 +We will discuss the first three items in this list in this microlearning. In the microlearnings that will follow this microlearning, we will delve deeper into various authentication possibilities.
29 29  
30 -* Describing a best practice everyone should follow
31 -* Describing (more complex) parts of the flow
32 -* Describe (parts of) your message definitions
38 +Before we delve into the configuration of the component let us first move to Create and open an exit flow in which we want to call the SOAP Webservice. When you open the exit flow it will look similar to this:
33 33  
34 -To clarify the use cases let us take a look at how annotations can be added within the eMagiz platform. In our first example, we will take a look at asynchronous routing. In many eMagiz projects, a best practice is followed on how to add something to the asynchronous routing (or change something within the asynchronous routing). Because the best practice contains multiple steps it makes sense to use the annotation functionality of eMagiz to define all these steps and register them at the place you need them (i.e. the asynchronous routing). Having done so will result in something like this:
40 +[[image:Main.Images.Microlearning.WebHome@novice-soap-webservice-connectivity-calling-a-soap-webservice--exit-flow-starting-point.png]]
35 35  
36 -[[image:Main.Images.Microlearning.WebHome@novice-devops-perspectives-annotations--annotation-best-practice-async-routing.png]]
42 +Now that we have opened the flow and are in "Start Editing" mode we need to add the web service outbound gateway to start with.
37 37  
38 -The second example is about using annotations on the flow level to describe parts of the flow. In this example, we will use the annotation to describe that we use a filter to determine which messages are picked up from a local directory and how we filter. That way anyway opening the flow has to merely read the annotation to get the context. Having done so will result in something like this:
44 +[[image:Main.Images.Microlearning.WebHome@novice-soap-webservice-connectivity-calling-a-soap-webservice--web-service-outbound-component.png]]
39 39  
40 -[[image:Main.Images.Microlearning.WebHome@novice-devops-perspectives-annotations--describe-parts-of-flow.png]]
46 +=== 3.1 URL ===
41 41  
42 -The third example does not take place on the flow level but the message definition level. Therefore instead of going to Create, we go to Design. In Design when you navigate to the CDM, API Gateway Data model, Event Streaming Data model, message definitions, etc. you have the option to add annotations to the canvas. In this example, we want to make clear to all that make changes that a certain part of our CDM is used by a lot of integrations within eMagiz and therefore everyone should be careful and think twice before adjusting anything related to that part. Having done so will result in something like this:
48 +Now that we have added the correct component to the canvas it has become time to configure the component correctly. The first thing to configure when calling a SOAP Webservice is determining and registering the endpoint (URL) eMagiz should call to deliver the message too. As always in scenarios where an information element can change between environments, you should use a property reference and determine the correct value on a per-environment basis.
43 43  
44 -[[image:Main.Images.Microlearning.WebHome@novice-devops-perspectives-annotations--describe-crucial-part-of-cdm.png]]
50 +[[image:Main.Images.Microlearning.WebHome@novice-soap-webservice-connectivity-calling-a-soap-webservice--web-service-outbound-component-url.png]]
45 45  
46 -Now that we saw some examples let us turn our attention to the how. How can I add an annotation and how can I link it. Adding the annotation is simple. You drag the annotation icon from the left context menu onto the canvas. As a result, an empty annotation will be shown on the canvas. By double-clicking on it you can type whatever you want. Note that you need to be in "Start Editing" mode to change anything, including annotations.
52 +=== 3.2 Retry Advice ===
47 47  
48 -[[image:Main.Images.Microlearning.WebHome@novice-devops-perspectives-annotations--annotation-icon-context-menu.png]]
54 +The second setting we need to configure is the retry advice. With retry advice, you can guard your solution against temporary connection losses between eMagiz and the external party. As this can happen from time to time the best practice is to configure such a Retry Advice on every Web Service Outbound component. To add the Retry Advice move to the Advanced tab and move down to the Request handler advice chain segment. Within this segment, you will see a button called Retry Advice.
49 49  
50 -When you are satisfied with what you have written down you can press the Save button. After you have done so you can rescale the annotation to ensure that the complete text is visible. To link the annotation to a component (on flow level) or an entity (on message definition level) you hover over the annotation until your mouse indicator changes to a + icon, execute a right-click and drag from the annotation to the component in question.
56 +[[image:Main.Images.Microlearning.WebHome@novice-soap-webservice-connectivity-calling-a-soap-webservice--web-service-outbound-component-retry-advice-button.png]]
51 51  
52 -Now you know what annotations are good for and how you can add them within the eMagiz platform.
58 +When you click on the Retry Advice button you will be prompted with a pop-up. In here you need to configure the exact settings
53 53  
60 +[[image:Main.Images.Microlearning.WebHome@novice-soap-webservice-connectivity-calling-a-soap-webservice--web-service-outbound-component-retry-advice-pop-up-empty.png]]
61 +
62 +The best practice for this configuration is as follows for asynchronous solutions:
63 +* Select the option called Simple Retry Policy
64 +* Set the max attempts at 6
65 +* Select the Fixed back off policy
66 +* Set the backoff period at 5000 (ms)
67 +
68 +When you have done so the configuration should look as follows. The only thing left is to press Save to save your Retry Advice configuration
69 +
70 +[[image:Main.Images.Microlearning.WebHome@novice-soap-webservice-connectivity-calling-a-soap-webservice--web-service-outbound-component-retry-advice-pop-up-filled-in.png]]
71 +
72 +=== 3.3 Error Handling ===
73 +
74 +When calling a SOAP Web service with the configuration we have defined up till here you could suffer from cryptic error response you get back when the SOAP web service call fails. To improve the error handling to make your life easier when analyzing the problem you need to add a support object to the canvas and link it to the web service outbound gateway. This support object is named "Detailed SOAP Fault Message Resolver".
75 +
76 +To link the support object to your web service outbound gateway you open the web service outbound gateway, navigate to the Advanced tab, and select the Fault message resolver. Afterward press Save to save the link between the components.
77 +
78 +[[image:Main.Images.Microlearning.WebHome@novice-soap-webservice-connectivity-calling-a-soap-webservice--web-service-outbound-component-fault-message-resolver.png]]
79 +
80 +Now that we have configured the HTTP Outbound component to our liking we can press Save on the component level to store our changes. As a result the flow will look as follows:
81 +
82 +[[image:Main.Images.Microlearning.WebHome@microlearning/novice-soap-webservice-connectivity-calling-a-soap-webservice--flow-result.png]]
83 +
54 54  == 4. Assignment ==
55 55  
56 -Add annotation on the flow level that describes how (a part of) a flow works.
86 +Build a flow within your project in which you do a call to an external party that hosts a SOAP web service.
57 57  This assignment can be completed with the help of the (Academy) project that you have created/used in the previous assignment.
58 58  
59 59  == 5. Key takeaways ==
60 60  
61 -* Annotations can be used for:
62 - * Describing a best practice everyone should follow
63 - * Describing (more complex) parts of the flow
64 - * Describe (parts of) your message definitions
65 -* You can add annotations by dragging and dropping the annotation icon on the canvas.
91 +* eMagiz will create a valid SOAP message when using this component
92 +* eMagiz provides a support object for better error handling of SOAP faults
93 +* There are four key configuration elements:
94 + ** URL
95 + ** Retry Advice
96 + ** Error Handling
97 + ** Authentication
66 66  
67 67  == 6. Suggested Additional Readings ==
68 68  
69 -There are no suggested additional readings on this topic
101 +If you are interested in this topic and want more information on it please read the help text provided by eMagiz.
70 70  
71 71  == 7. Silent demonstration video ==
72 72  
73 -This video demonstrates how you could have handled the assignment and gives you some context on what you have just learned.
105 +{{video attachment="novice-soap-webservice-connectivity-calling-a-soap-webservice.mp4" reference="Main.Videos.Microlearning.WebHome"/}}
74 74  
75 -{{video attachment="novice-devops-perspectives-annotations.mp4" reference="Main.Videos.Microlearning.WebHome"/}}
76 -
77 77  )))((({{toc/}}))){{/container}}{{/container}}