Changes for page Volume Mapping (On-premise)
Last modified by Erik Bakker on 2024/08/26 12:37
From version 28.2
edited by Erik Bakker
on 2022/06/10 13:13
on 2022/06/10 13:13
Change comment:
Update document after refactoring.
To version 45.1
edited by Erik Bakker
on 2022/10/31 10:43
on 2022/10/31 10:43
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... ... @@ -1,1 +1,1 @@ 1 - novice-file-based-connectivity-processing-a-file-per-line1 +Volume Mapping (On-premise) - Default language
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... ... @@ -1,11 +1,9 @@ 1 1 {{container}}{{container layoutStyle="columns"}}((( 2 -In this microlearning, we will learn how you can define a header line in which you specify the naming of the various columns. Some external systems require a header line when you supply them with data via a flat file that is placed somewhere. 3 3 3 +When you need to read and write files from an on-premise disk, you need to know the path in which the data is stored and make sure that the docker container in your runtime(s) running has access to this path. There are several ways of dealing with this challenge. First, this microlearning will discuss the various alternatives and best approaches in these scenarios. 4 + 4 4 Should you have any questions, please contact [[academy@emagiz.com>>mailto:academy@emagiz.com]]. 5 5 6 -* Last update: May 28th, 2021 7 -* Required reading time: 5 minutes 8 - 9 9 == 1. Prerequisites == 10 10 11 11 * Basic knowledge of the eMagiz platform ... ... @@ -12,59 +12,91 @@ 12 12 13 13 == 2. Key concepts == 14 14 15 -This microlearning centers around learning how to placeaheader line on a flat-fileoutput.13 +This microlearning centers around learning how to set up your volume mapping correctly so you can exchange file-based data on-premise. 16 16 17 -By headerlinewe mean:A linein theoutputthat definesthenamingof thevariouscolumns15 +By volume mapping, we mean: Creating a configuration through which the docker container can read and write data on a specific path on an on-premise machine. 18 18 19 -Some external parties require that the first line in the flat file output (i.e. CSV) is filled with column names (i.e. headers). In eMagiz, we call this line a header line. 17 +There are several options for volume mapping for your on-premise machine. 18 +* Volume 19 +* Bind mount 20 +* Temporary file system 21 +* Named pipe 20 20 21 -== 3. Headerline ==23 +== 3. Volume Mapping (On-premise) == 22 22 23 - In thismicrolearning,wewill learnhowyoucandefineaheaderlineinwhichyou specifythenaming ofthe variouscolumns. Someexternalsystems require a headerlinewhen yousupplythemwithdataviaa flatfilethatis placedsomewhere.Theheaderineisthefirstlineintheflatfileoutput.Withinthis line,the variouscolumnnames arespecifiedforclarity.25 +When you need to read and write files from an on-premise disk, you need to know the path in which the data is stored and make sure that the docker container in your runtime(s) running has access to this path. There are several ways of dealing with this challenge. First, this microlearning will discuss the various alternatives and best approaches in these scenarios. 24 24 25 -To add such a header line in eMagiz you need to navigate to the Create phase of eMagiz and open the exit flow in which you want to drop the file to a certain location. Within the context of this flow, we need to add functionality that will ensure that a header line is written to the output before any functional lines are added. To do so first enter "Start Editing" mode on flow level. After you have done so please add a file outbound channel adapter to the flow including an input channel. We will use this component to write our header line to the flat file output. 27 +There are several options for volume mapping for your on-premise machine. 28 +* Volume 29 +* Bind mount 30 +* Temporary file system 31 +* Named pipe 26 26 27 - Ensurethatthe directory to which youreferenceisthesameas inyourfunctionalfileoutbound channeladapter.33 +Below we will explain the differences between the various options available for your volume mapping. But before we do, we first explain how to set up this configuration within eMagiz. Then, you must navigate to Deploy -> Architecture on the model level. In this overview, you can access the Volume mapping per runtime deployed on-premise. To do so, you can right-click on the runtime to access the context menu. 28 28 29 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity- header-line--file-outbound-channel-header-line.png]]35 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--volume-option-context-menu.png]] 30 30 31 - Nowitis time toturn ourattentionto theAdvancedtab. For theMode select Ignore.Selectthisoptionto ensure that theheader lineis onlywrittendownoncewhen thereisnooutput createdyetdnotsomewhereinthemiddle,intheend,oreverytime. Furthermore,select the optionAppendNew Line to ensure that the remainderoftheinformationisnot appendedto thesame line.37 +When you click this option, you will see the following pop-up. In this pop-up, you can define the machine-level and runtime-level volumes. More on that later. This is the starting point for configuring your volume mapping. We will walk through each available option and explain how they work and should be configured. 32 32 33 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity- header-line--file-outbound-channel-header-line-advanced.png]]39 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--volume-mapping-pop-up.png]] 34 34 35 - After you have done so we needto add a standard transformerthatdefines the variouscolumnnames tobewritten to the flatfileoutput. Todo so addthe standardtransformer componenttothecanvasincluding an input channel.After youhavedone so define the relevant SpEL expression. In this case, we advise usinga property value thatrepresentsastringofcolumnnames. Thevalueof theproperty should be somethingasfollows:41 +{{info}}Note that you should be in "Start editing" mode to make any changes to the configuration of your volume mapping.{{/info}} 36 36 37 - 'Header1;Header2;Header3;Header4'43 +=== 3.1 Volume === 38 38 39 - Do note thattheseparator,inthis case,needstomatchtherequirementsof theexternalsystem. At theflowconfiguration level,thestandardtransformershouldlookasfollows.45 +The first type available to you is Volume. With this option you create one or more folders on docker that is relevant for that runtime to read and/or write **persistent** data. To configure this type you need to link the runtime volume to a machine volume that you can create within the same pop-up. This means that you can re-use a "Machine volume" over multiple runtimes (i.e. containers). 40 40 41 - [[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-header-line--define-columns-names.png]]47 +So, at first we open the tab called "Machine volume". By pressing the "New" button we can define a new "Machine volume". In the pop-up that follows we can define the name of a machine volume and tell whether the volume already exists on your docker installation or not. 42 42 43 - Our last stepis to ensure that this piece of logic is tied to the mainflowand is executed before writingthefunctionalline(s) to the output file. To make that happenwe need to add a wiretap to the flow.ith thehelpof this functionality, youcan define which part of thelogic takesprecedenceover another partof the logic. To do so double click onthe channel on whichyou want to placewiretap, select the optionwiretapand select the correct wiretapchannel. After you have done this the result should bemethings follows:49 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--machine-volumes-configuration.png]] 44 44 45 - [[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-header-line--wiretap-result.png]]51 +Once you have done so we press "Save" and switch back to the "Runtime volumes" tab. In here we press the "New" button to create a new "Runtime volume". In the pop-up that follows we first need to select the Type we want to use. For this example we use the type called "Volume". Based on your selection the relevant input fields will change. 46 46 47 - With theseupleof steps, you havew successfullyaddedlogicoyour flow that will ensurethat a header lineadded before any functionalline(s) are writteno theutput file.53 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--runtime-volumes-configuration-type-volume.png]] 48 48 55 +The first thing we need to select is the "Machine volume". Once we have selected our "Machine volume" we need to select the Target that is specific for this runtime. This target defines the second part of the path to which the runtime will gain access. For example, when you fill in "/target" we can combine this with the "Machine volume" name to arrive at the correct directory from which eMagiz needs to read data (or write data to). So in our case this would be "/file-directory/target." 56 + 57 +The last setting we need to configure is to define which rights we will grant our runtime on the volume we are creating. The default setting is read/write rights for the runtime which is sufficient in most cases. The result of following these steps will be the following. 58 + 59 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--runtime-volumes-configuration-type-volume-filled-in.png]] 60 + 61 +{{warning}}Note, that when you use the Volume option the external system with which you exchange data on-premise via a file based method need to be able to write or read the data from the volume (i.e. directory) you have configured in Docker. Should this be a problem the Bind mount alternative discussed below should be considered.{{/warning}} 62 + 63 +=== 3.2 Bind mount === 64 + 65 +An alternative option to read and write **persistent** data is to use the "Bind mount" option avaiable. In general we advice to use the "Volume" option because they have better performance and bind mounts are dependent on the directory structure and OS of the host machine. Having said that not all external systems can adapt to this that easily. That is why the "Bind mount" option can be of interest in your use case. 66 + 67 +To configure a "Bind mount" you need to define a source and a target directory that are linked to each other. The source directory defines the directory on your local system (that might already be in use currently to exchange files). The target directory defines a directory on your docker installation that can be accessed by the runtime. 68 + 69 +=== 3.3 Temporary file system === 70 + 71 +=== 3.4 Named pipe === 72 + 73 +The named pipe option can be selected but we yet have to see a valid use case within the context of eMagiz for using this option. Therefore we won't discuss this option further in this microlearning. 74 + 49 49 == 4. Assignment == 50 50 51 -Configure an e xit in which you defineandwrite aheaderlinetoaflat-file outputbefore adding functional lines.77 +Configure an entry in which you build the archiving and the clean up of the archiving. 52 52 This assignment can be completed with the help of the (Academy) project that you have created/used in the previous assignment. 53 53 54 54 == 5. Key takeaways == 55 55 56 -* The header line contains the names of the columns of the flat file output 57 -* Use the Ignore mode to ensure the header line is created once 58 -* Use the wiretap to ensure the header line is created first 82 +* Archiving is used for audit purposes 83 +* Archiving is used for retry scenarios 84 +* Ensure that data is cleaned after a retention period to keep in control of the data 85 +* Don't forget the max messages per poll 59 59 60 60 == 6. Suggested Additional Readings == 61 61 62 - Thereare no suggested additional readingson thistopic89 +If you are interested in this topic and want more information on it please read the help text provided by eMagiz and check out the following store content: 63 63 91 +* [[File Archiving>>doc:Main.eMagiz Store.Accelerators.File Archiving.WebHome||target="blank"]] 92 +* [[Delete Folder(s)>>doc:Main.eMagiz Store.Accelerators.Delete Folder(s).WebHome||target="blank"]] 93 + 64 64 == 7. Silent demonstration video == 65 65 66 66 This video demonstrates how you could have handled the assignment and gives you some context on what you have just learned. 67 67 68 -{{video attachment="novice-file-based-connectivity-h eader-line.mp4" reference="Main.Videos.Microlearning.WebHome"/}}98 +{{video attachment="novice-file-based-connectivity-characterset.mp4" reference="Main.Videos.Microlearning.WebHome"/}} 69 69 70 70 )))((({{toc/}}))){{/container}}{{/container}}