Ten Advantages Of Precedence Diagram Software And How You Can Make Full Use Of It | Precedence Diagram Software

This is the tenth commodity in a alternation advantaged Stairway to Affiliation Services. Antecedent accessories in the alternation include:

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In the antecedent installment, we alien accountability altruism by analytical methods of assignment beheading accompaniment administration application the MaximumErrorCount and ForceExecutionResult properties. We additionally advised the accord amid SSIS Ascendancy Flow assignment errors, containers, and accident handlers.

This chapter focuses on the behavior of events. In this article, we allotment two methods for manipulating the absence behavior of accident manual (bubbling). We additionally acquaint the Parent-Child arrangement and authenticate accident behavior in the Parent-Child pattern.

Accessible the Precedence.dtsx package. Your Ascendancy Flow should arise as apparent in Figure 1:

Figure 1

As in Step 9, we focus on Sequence Alembic 1.

In Step 9 of this series, we created OnError accident handlers – which we declared as accident “listeners” – on Calligraphy Assignment 4 and Sequence Alembic 1. To anniversary OnError accident handler, we added a Calligraphy Assignment that displays a bulletin box absolute the ethics of the afterward SSIS OnError accident abettor variables:

Afore we activate testing, let’s verify and/or change some settings from the antecedent body of the Precedence.dtsx SSIS package. First, bang on Sequence Alembic 1 and again columnist the F4 key to affectation Properties. Accomplish assertive the ForceExecutionResult acreage charcoal set to “Success”. Aing bang on Calligraphy Assignment 4 and columnist the F4 key to affectation Properties. Change the MaximumErrorCount acreage to 1.

Afore we accomplish any added changes, assassinate the Precedence.dtsx SSIS amalgamation in the BIDS (Business Intelligence Development Studio) debugger by acute the F5 key. Your acknowledgment to the alert “Succeed Calligraphy Assignment 2?” does not amount for the purposes of demonstration, but now and throughout this commodity we will opt to bang the Yes on apparent in Figure 2 to account the Calligraphy Assignment to succeed:

Figure 2

Aback prompted to “Succeed Calligraphy Assignment 4?” – as apparent in Figure 3 – bang the No on to accession an Absurdity accident from Calligraphy Assignment 4:

Figure 3

Aback Calligraphy Assignment 4 raises an Absurdity event, the OnError accident abettor we configured in Step 9 “hears” the Absurdity accident and executes, announcement a bulletin box agnate to that apparent in Figure 4:

Figure 4

But the Absurdity accident doesn’t stop there, it continues to balloon up in ambit – traversing the beheading assemblage to the aing level: Sequence Alembic 1, which contains Calligraphy Assignment 4. We see a agnate bulletin box displayed from the OnError accident abettor configured on Sequence Alembic 1 apparent in Figure 5:

Figure 5

Once we accede this bulletin box, addition bulletin box displays allegorical me that Calligraphy Assignment 3 has completed. Acknowledging the Calligraphy Assignment 3 bulletin box allows the Precedence.dtsx SSIS amalgamation to complete beheading in the BIDS debugger, and it appears as apparent in Figure 6:

Figure 6

Agenda that Sequence Alembic 1 succeeds. Or, at least, letters success. Why?

In Step 9 we set the ForceExecutionResult acreage of Sequence Alembic 1 to “Success” and we never afflicted it aback to the absence ambience (“None”). This was advised (and we absolute this earlier) to authenticate the alternation amid the ForceExecutionResult acreage of Sequence Alembic 1 and Sequence Alembic 1’s acknowledgment to Absurdity events. While the ForceExecutionResult acreage overrides the beheading cachet of Sequence Alembic 1, it does not baffle with Sequence Alembic 1’s adeptness to “hear” and acknowledge to Absurdity events. It may arise that Sequence Alembic 1 ignores Absurdity contest aback ForceExecutionResult is set to “Success” but that is inaccurate and we aloof accepted it. Please agenda that there is a way to avoid accident handlers, and we will authenticate this functionality at the end of this article. The alternation amid accident handlers and the ForceExecutionResult acreage provides adaptability to abstracts affiliation developers, facilitating accountability tolerance. This is important: An absurdity can action and be “heard” (and responded to) after declining the Ascendancy Flow.

It is important to bethink that accident bubbles will account the Absurdity accident to abide manual up the beheading stack. In our example, the aing akin of ambit is the Precedence.dtsx SSIS amalgamation Ascendancy Flow which is adumbrative of the SSIS amalgamation itself.

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Since we accept not afflicted the MaximumErrorCount or ForceExecutionResult backdrop for the Precedence.dtsx SSIS package, the amalgamation will abort aback the Absurdity bubbles to the amalgamation container.

This may or may not be adapted behavior.

We are faced with a architecture decision. We can either: A) add accountability altruism at anniversary akin of ambit aloft the assignment for which we appetite to allurement an absurdity – and thereby add accountability altruism to the absolute amalgamation (whether we admiration this or not); or B) we can arrest the absence bubbles behavior of the Absurdity accident at Calligraphy Assignment 4. Let’s go with advantage B.

Acknowledgment to Calligraphy Assignment 4’s OnError accident abettor and affectation the Variables window by beat the SSIS dropdown menu, and again bang Variables as apparent in Figure 7:

Figure 7

Once the Variables window displays, baddest the Appearance Arrangement Variables on apparent in Figure 8:

Figure 8

The System::Propagate capricious is a Boolean capricious that defaults True. Apparent in Figure 9, System::Propagate is the accident bubbles ascendancy variable:

Figure 9

Bang on the Amount cavalcade and change the absence amount from Accurate to False as apparent in Figure 10:

Figure 10

Assassinate the Precedence.dtsx SSIS amalgamation in the BIDS debugger. Aback prompted to “Succeed Calligraphy Assignment 2,” bang Yes; aback prompted to “Succeed Calligraphy Assignment 4,” bang No. Calligraphy Assignment 4’s OnError accident abettor executes as apparent in Figure 11:

Figure 11

The screenshot apparent in Figure 12 demonstrates Calligraphy Assignment 3 is active and Sequence Alembic 1’s OnError accident abettor has not executed:

Figure 12

The Absurdity accident aloft by Calligraphy Assignment 4 was “heard” by Calligraphy Assignment 4’s OnError accident handler, but it did not balloon to Sequence Alembic 1’s OnError accident handler.

We can programmatically ascendancy accident bubbles central a Calligraphy Task. To demonstrate, accessible the Calligraphy Assignment editor on Calligraphy Assignment 4’s OnError accident handler, and again add the System::Propagate SSIS capricious to the ReadWriteVariables acreage as apparent in Figure 13:

Figure 13

Accessible the .Net calligraphy editor by beat the Adapt Calligraphy on. Adapt the cipher in Public Sub Main(), abacus the If/Then account apparent in Listing 1 starting at Band 56, as apparent in Figure 14:

Figure 14

This change in the .Net calligraphy adds codicillary argumentation that controls the amount of the System::Propagate variable, depending on the amount of the System::ErrorCode capricious (via the VB.Net Calligraphy capricious iErrorCode, which reads System::ErrorCode). Afore active a analysis beheading of the Precedence.dtsx SSIS package, change the absence amount of the System::Propagate SSIS capricious Calligraphy Assignment 4’s OnError accident abettor aback to Accurate as apparent in Figure15:

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Figure 15

Ambience System::Propagate to Accurate turns accident bubbles on by default. If the OnError accident doesn’t balloon now, it is because we are alteration the System::Propagate SSIS capricious amount from Accurate to False in the Script. Assassinate the Precedence.dtsx SSIS amalgamation in the BIDS debugger by acute F5. Aback prompted to “Succeed Calligraphy Assignment 2,” bang Yes; aback prompted to “Succeed Calligraphy Assignment 4,” bang No.

Observing Calligraphy Assignment 4’s OnError accident handler, we see the Calligraphy Assignment executes and displays absurdity accident details, including an ErrorCode amount 8, apparent in Figure 16:

Figure 16

Figure 17 demonstrates we auspiciously afflicted the System::Propagate capricious amount from Accurate – the absence amount we afflicted afore active this analysis – to False central the Calligraphy code, as Calligraphy Assignment 3 executes and Sequence Alembic 1’s OnError accident abettor does not execute:

Figure 17

Accident bubbles has been programmatically managed and we accept accomplished activating accountability altruism in SSIS.

We can analysis this by altering the ErrorCode amount aloft by Calligraphy Assignment 4. On the Ascendancy Flow, accessible the Calligraphy Assignment 4 editor, and again accessible the calligraphy editor by beat the Adapt Calligraphy on. As I adapt the cipher in the If/Then cipher block that responds to the bulletin box on click, apparent in Figure 18, you can see the IntelliSense for the Dts.Events.FireError adjustment (if you attending closely, it is a adumbration to my screenshot abduction software):

Figure 18

Comment out the line:

Aloof below the band you aloof commented out, add the line:

Your cipher should arise as apparent in Figure 19 and Listing 2:

Figure 19

Listing 2

This cipher alters the acknowledgment to the user beat the No on aback prompted to “Succeed Calligraphy Assignment 4?” Calligraphy Assignment 4 now generates a custom absurdity cipher and absurdity description; -1001 and “Script Assignment 4 failed!” respectively. The altercation account for the Dts.Events.FireError adjustment are: ErrorCode, SubComponent, Description, HelpFile, and HelpContext, respectively.

To test, assassinate the Precedence.dtsx SSIS amalgamation in the BIDS debugger by acute F5. Aback prompted to “Succeed Calligraphy Assignment 2,” bang Yes; aback prompted to “Succeed Calligraphy Assignment 4,” bang No. Observing Calligraphy Assignment 4’s OnError accident handler, we see the bulletin box displays backdrop of an Absurdity accident that are altered from before, as apparent in Figure 20:

Figure 20

Because the cipher in the Scrip Assignment independent in Calligraphy Assignment 4’s OnError accident abettor alone sets System::Propagate to False aback the System::ErrorCode capricious amount equals 8, this accident bubbles to Sequence Alembic 1’s OnError accident handler, as apparent in Figure 21:

Figure 21

In this demonstration, we acclimated an If/Then codicillary account in Calligraphy Assignment 4’s OnError calligraphy to abstract a distinct ErrorCode value. But you can use added codicillary statements, such as Baddest Case in VB or Switch in C#. You accept added options because accident handlers betrayal the Ascendancy Flow toolbox.

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Accident bubbles can extend above the area of a distinct SSIS package. To appraise this behavior of events, we accept to booty a minute and acquaint the Parent-Child SSIS architecture pattern.

The SSIS Assassinate Amalgamation Assignment is acclimated to alarm an SSIS amalgamation from addition SSIS package. Aback one amalgamation calls another, the calling amalgamation – the one absolute the Assassinate Amalgamation Assignment – is referred to as the ancestor amalgamation while the amalgamation alleged by the Assassinate Amalgamation Assignment is referred to as the adolescent package. It turns out this description is added than alone semantics; it provides a acceptable description of some absorbing behavior and alternation amid the packages.

Let’s add a new SSIS amalgamation to the My_First_SSIS_Project band-aid to demonstrate. In Band-aid Explorer, right-click the SSIS Bales basic folder, and again bang New SSIS Amalgamation as apparent in Figure 22:

Figure 22

A new amalgamation is created and added to the solution. Because this band-aid already contains an SSIS amalgamation called Package.dtsx, the new amalgamation is called Package1.dtsx. Right-click Package1.dtsx and again bang Rename to change the name of the new SSIS amalgamation to Parent.dtsx as apparent in Figure 23:

Figure 23

Aback you columnist the Enter key, you are prompted and asked if you appetite to rename the Amalgamation commodity as well, as apparent in Figure 24:

Figure 24

Always acknowledgment this alert by beat the Yes on. The SSIS bales in Band-aid Explorer represent two objects: a book in the book arrangement and a Amalgamation commodity in the solution. Aback you rename a package, the book name is afflicted aboriginal and again you are asked if you appetite to additionally rename the amalgamation object. I cannot anticipate of a acceptable acumen you would appetite the amalgamation book called one affair and the amalgamation commodity called commodity different. There may be a acceptable use case for this, I am artlessly blind of one.

You now accept a amalgamation called Parent.dtsx in your SSIS band-aid as apparent in Figure 25:

Figure 25

Annoyance an Assassinate Amalgamation Assignment assimilate the Ascendancy Flow as apparent in Figure 26:

Figure 26

Double-click the Assassinate Amalgamation Assignment to accessible the Assassinate Amalgamation Assignment Editor. Since we are activity to alpha an SSIS amalgamation stored in the book system, change the Area acreage to “File system” as apparent in Figure 27:

Figure 27

We now charge to configure an SSIS Book Connection Manager with the area of the Precedence.dtsx amalgamation in the book system. Bang the dropdown on the Connection acreage and bang the “<New connection…>” account as apparent in 28:

Figure 28

Aback the Book Connection Manager Editor opens, bang the Browse on. Aback the Baddest Book window displays, cross to the area of the Precedence.dtsx book in your book system. If you cross to the binder absolute your SSIS band-aid (…My_First_SSIS_Project), you will acquisition the Precedence.dtsx book amid at …My_First_SSIS_ProjectMy_First_SSIS_ProjectPrecedence.dtsx as apparent in Figure 29:

Figure 29

Bang the Precedence.dtsx book and again bang the Accessible on. This allotment you to the Book Connection Manager Editor and places the abounding aisle to the Precedence.dtsx book in the Book textbox as apparent in Figure 30:

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Figure 30

Bang the OK on to complete conception of the Book Connection Manager and acknowledgment to the Assassinate Amalgamation Assignment Editor, as apparent in Figure 31:

Figure 31

Bang the OK on to aing the Assassinate Amalgamation Assignment Editor. Aback we assassinate the Parent.dtsx SSIS amalgamation in the BIDS debugger, it will alarm the Precedence.dtsx SSIS package. Afore we assassinate the SSIS amalgamation in the BIDS debugger, I would like to appearance you a accessible ambush for testing SSIS bales accommodating in the Parent-Child SSIS architecture pattern. If both Parent.dtsx and Precedence.dtsx are not open in BIDS, accessible both of them now. They should arise agnate to Figure 32:

Figure 32

Left-click and authority on the tab labeled “Precedence.dtsx” and annoyance it to the appropriate a few pixels, and again absolution the left-mouse on. Aback you absolution the larboard abrasion on, you are prompted to actualize a new Tab Group – Horizontal or Vertical. Baddest New Vertical Tab Group as apparent in Figure 33:

Figure 33

BIDS will align the bales as apparent in Figure 34, which makes afterward Parent-Child executions abundant easier:

Figure 34

Bang in the white amplitude of the Parent.dtsx SSIS package’s Ascendancy Flow to accomplish abiding Parent.dtsx is selected. Columnist the F5 key to assassinate the Parent.dtsx SSIS amalgamation – which will alarm Precedence.dtsx – and aback prompted to “Succeed Calligraphy Assignment 2,” bang Yes; aback prompted to “Succeed Calligraphy Assignment 4,” bang No. Accede the OnError accident abettor letters generated by Calligraphy Tasks on Calligraphy Assignment 4’s OnError accident abettor and Sequence Alembic 1’s OnError accident handler. Accede the bulletin box allegorical you Calligraphy Assignment 3 has completed. Beheading should complete and BIDS should arise as apparent in Figure 35:

Figure 35

In Precedence.dtsx, agenda Calligraphy Assignment 4 bootless and Sequence Alembic 1 succeeded. In Parent.dtsx, agenda the Assassinate Amalgamation Assignment failed. This action exists because the ForceExecutionResult acreage of Sequence Alembic 1 charcoal set to “Success.” An Absurdity accident bubbled through Sequence Alembic 1, though. We saw it aloof now; it appeared as apparent in Figure 36:

Figure 36

Commodity abroad happened that we cannot beam after added development accomplishment – the Precedence.dtsx SSIS amalgamation failed. Let’s add an OnError accident abettor to the Precedence.dtsx amalgamation to prove this. Copy the Calligraphy Assignment from Sequence Alembic 1’s OnError accident handler. Cross to the Precedence package’s OnError accident handler, bang the articulation to actualize it, and adhesive the Calligraphy Assignment there as apparent in Figure 37:

Figure 37

Accessible the Calligraphy Assignment Editor, and again bang the Adapt Calligraphy on to accessible the calligraphy editor. Adapt Band 46 of the cipher apparent in Figure 38 to apprehend as apparent in Listing 4:

Listing 4

Figure 38

Bang in the white amplitude of Precedence.dtsx’s Ascendancy Flow to accomplish abiding it is selected, and again columnist the F5 key to assassinate the Precedence.dtsx SSIS amalgamation in the BIDS debugger. Aback prompted to “Succeed Calligraphy Assignment 2,” bang Yes; aback prompted to “Succeed Calligraphy Assignment 4,” bang No. Beam the Precedence OnError accident abettor as the OnError accident handlers assassinate and affectation bulletin boxes. You will now see a bulletin box displayed aback the Precedence OnError accident abettor executes, as apparent in Figure 39:

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Figure 39

Copy the Calligraphy Assignment in the Precedence OnError accident abettor to the clipboard. Cross to the Ancestor package’s OnError accident handler, actualize the accident handler, and adhesive the Calligraphy Task, as apparent in Figure 40:

Figure 40

Accessible the Calligraphy Assignment Editor, bang the Adapt Calligraphy on to accessible the calligraphy editor, and alter the band in Listing 5:

Listing 5

with the band in Listing 6:

Listing 6

as apparent in Figure 41 on Lines 46-47:

Figure 41

Bang in the white amplitude of the Parent.dtsx SSIS package’s Ascendancy Flow to accomplish abiding Parent.dtsx is selected. Columnist the F5 key to assassinate the Parent.dtsx SSIS amalgamation – which will alarm Precedence.dtsx – and aback prompted to “Succeed Calligraphy Assignment 2,” bang Yes; aback prompted to “Succeed Calligraphy Assignment 4,” bang No. Accede the OnError accident abettor letters generated by Calligraphy Tasks on Calligraphy Assignment 4’s OnError accident handler, Sequence Alembic 1’s OnError accident handler, and the Precedence package’s OnError accident handler. Agenda the Ancestor package’s OnError accident abettor executes next, as apparent in Figure 42:

Figure 42

There are a brace absorbing things I ambition to point out here.

First, in the Parent-Child SSIS architecture pattern, the Absurdity accident bubbles from the “bottom” of the Precedence.dtsx SSIS amalgamation – Calligraphy Assignment 4 – to the “top” of the Parent.dtsx SSIS package. Figure 44 shows my “artist’s concept” of what is absolutely and absolutely accident here. The Precedence.dtsx amalgamation acts as if it is “in scope” of the Parent.dtsx package’s Assassinate Amalgamation Assignment – like it is in an “Executables” basic binder of the Assassinate Amalgamation Task. In absolute life, you will never appearance a Amalgamation Explorer diagram that displays the accord I created in Figure 43. Assassinate Amalgamation Tasks do not accept an Executables basic folder, and if they did you would not see the Amalgamation Explorer from the adolescent amalgamation included therein (at atomic not in a accepted adaptation of SSIS at the time of this writing). But this represents the behavior of accident bubbles in the Parent-Child SSIS architecture pattern:

Figure 43

Second, the Absurdity event, originally generated at Calligraphy Assignment 4, is still configured with its aboriginal capricious values. The ErrorCode, ErrorDescription, and SourceName SSIS capricious ethics abide changeless as the Absurdity accident bubbles – alike aback it bubbles from the adolescent amalgamation to the ancestor package, as apparent in Figure 44:

Figure 44

This behavior applies to all SSIS Assignment events, not aloof the OnError events. If one amalgamation is accomplished from addition application the Assassinate Amalgamation Task, contest balloon to the top of the ancestor amalgamation by default. And from our antecedent demonstrations, you apperceive how to change the absence behavior if you appetite to administer the bubbles behavior of assertive accident codes.

I can apprehend you thinking, “Well then, Andy; do we charge to administer contest in a Parent-Child SSIS architecture arrangement at the adolescent level? Can’t we aloof administer them all at the ancestor level?” The acknowledgment is, “It depends.” If that behavior fits your action accident administration design, again yes. But there are accurate use cases for accoutrement alone SSIS assignment and alembic contest at the adolescent amalgamation scope, alike if you are acceptance best contest to balloon to the top of the ancestor package. The key, I believe, is now you apperceive added about the adaptability you accept in configuring these events. You now accept options, and options are good.

The aftermost affair I appetite to altercate in this commodity is the DisableEventHandlers property. Executables in SSIS – SSIS tasks and containers, in added words – anniversary accept a DisableEventHandlers property. The DisableEventHandlers acreage is affiliated by executables aural the ambit of the assignment or container. This is an important acumen because it is not accurate for all properties. MaximumErrorCount and ForceExecutionResult backdrop are not inherited, for example. To demonstrate, bang the Precedence.dtsx Ascendancy Flow and again columnist the F4 key to affectation amalgamation properties. Change the DisableEventHandlers acreage to Accurate as apparent in Figure 45:

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Figure 45

Bang in the white amplitude of the Parent.dtsx SSIS package’s Ascendancy Flow to accomplish abiding Parent.dtsx is selected. Columnist the F5 key to assassinate the Parent.dtsx SSIS amalgamation – which will alarm Precedence.dtsx – and aback prompted to “Succeed Calligraphy Assignment 2,” bang Yes; aback prompted to “Succeed Calligraphy Assignment 4,” bang No. The aing bulletin box displayed is from the Ancestor OnError accident handler. Why? Because the Precedence.dtsx SSIS package’s accident handlers are now disabled.

Again, you may ambition to use adolescent amalgamation accident handlers to abstract assertive contest and arrest bubbling. There are accurate use cases for such designs.

In this article, we focused on the behavior of events. We approved two methods for altering the absence behavior of accident bubbling; disabling accident handlers application the DisableEventHandlers acreage and manipulating the System::Propagate SSIS capricious amount central an accident abettor application a Calligraphy Task. We alien the Parent-Child arrangement and advised accident behavior aural the Parent-Child pattern.

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