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Last modified by Erik Bakker on 2024/08/26 12:37
From version 41.1
edited by Erik Bakker
on 2022/10/31 09:07
Change comment: There is no comment for this version
To version 46.1
edited by Erik Bakker
on 2022/10/31 11:27
Change comment: There is no comment for this version

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42 42  
43 43  === 3.1 Volume ===
44 44  
45 -To make this work in eMagiz you need to navigate to the Create phase of eMagiz and open the entry flow in which you want to archive the files. Within the context of this flow, we need to add functionality that will ensure that each input file is archived and cleaned up when older than three days. To do so first enter "Start Editing" mode on flow level. The first decision we have to take is how we are going to name the files within the archiving. The best practice, in this case, is the original filename + the current time as a suffix. You can define this by dragging a format file name generator (support object) to the canvas.
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).
46 46  
47 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-archiving--file-name-generator.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.
48 48  
49 -After we have done this please add a file outbound channel adapter to the flow including an input channel. Ensure that you use a property for the directory that references another directory compared to the input directory to prevent creating an infinite loop.
49 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--machine-volumes-configuration.png]]
50 50  
51 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-archiving--archiving-config-file-outbound-basic.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.
52 52  
53 -Now that we have configured the basics let us turn our attention to the advanced configuration. In the advanced tab of this component, we need to select the file name generator to ensure that the files are named correctly. In case you process each line separately you have to choose whether to save them as separate files in the archive or by appending them again. This can be achieved by selecting the correct Mode. In most cases, however, the default Mode of Replace will suffice.
53 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--runtime-volumes-configuration-type-volume.png]]
54 54  
55 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-archiving--archiving-config-file-outbound-advanced.png]]
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 56  
57 -The moment you are satisfied press Save. Now that we have configured this it becomes time to determine how we get the needed input to write to our archive. In the example we are using here we want to archive our input file so we need to ensure that the data we received is written to the archive as soon as possible. To do so place a wiretap on the first channel after retrieving the file. This will make sure that the message is archived before processed further. The result should be something as shown below. Note that this same piece of logic could be applied in other flows within the eMagiz platform in a similar manner.
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 58  
59 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-archiving--archiving-result.png]]
59 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--runtime-volumes-configuration-type-volume-filled-in.png]]
60 60  
61 -=== 3.2 Clean up the Archive ===
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 62  
63 -To ensure that the data is not kept indefinitely we need to clean up the archive. We do so to prevent problems with disk space but also to prevent data leaks of old data that could impact the privacy of others. Before we can set up the logic in eMagiz we need to talk to the customer to see what an acceptable term is within which the data is kept. In most cases, this is a week or two weeks. In this example, we have chosen three days.
63 +=== 3.2 Bind mount ===
64 64  
65 -Now that we know the limit it is time to configure the components. We start with a composite file filter (support object). Within this filter, we at least define how old a file must be before it can be deleted (in milliseconds). If we turn three days into milliseconds we get 259200000. Furthermore, we at least define that we only want to delete regular files.
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 66  
67 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-archiving--file-list-filter-for-archive-cleanup.png]]
67 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--runtime-volumes-configuration-type-bind-mount.png]]
68 68  
69 -Having done so we can add a file inbound channel adapter to the canvas including an output channel. Ensure that the property reference for the directory matches the one you have used before in the outbound channel adapter. Furthermore link the filter to the component and define the poller according to the best practice.
69 +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.
70 70  
71 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-archiving--file-inbound-archive-cleanup.png]]
71 +{{warning}}Note, that when the source directory does not exists the runtimes cannot be deployed correctly.{{/warning}}
72 72  
73 -One thing we should not forget within this configuration is to set the Max messages per poll on the Advanced tab of the poller-configuration to a sufficiently high number (i.e. 50). If you forget to do so and you only check once a day it will mean that only one message will be deleted that day.
73 +[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-volume-mapping-on-premise--runtime-volumes-configuration-type-bind-mount-filled-in.png]]
74 74  
75 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-archiving--file-inbound-archive-cleanup-max-messages-per-poll.png]]
75 +{{info}}Note, that when you use this option your directory reference in your flow should refer to the "target" directory configured here.{{/info}}
76 76  
77 -Now eMagiz will check on a set time interval whether there are files that are older than three days that are ready for deletion. One last step to go. This last step will ensure that all files that fit the bill will be deleted from the archive. Simply add a standard service activator to the canvas and define the following SPeL expression within the component: payload.delete().
77 +=== 3.3 Temporary file system ===
78 78  
79 -[[image:Main.Images.Microlearning.WebHome@novice-file-based-connectivity-archiving--archive-cleanup-deletion.png]]
79 +=== 3.4 Named pipe ===
80 80  
81 -This will ensure that each file that is retrieved will indeed be deleted from the archive.
81 +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.
82 82  
83 83  == 4. Assignment ==
84 84