The Unbearable Stupidity of Modeling

The Unbearable Stupidity of Modeling Ed Merks | Peter Friese (c) 2009 Ed Merks | Peter Friese. Distributed under the EDL V1.0 - http://www.eclipse.org/org/documents/edl-v10.php Thursday, March 26, 2009

Twitter: #eclipsecon #emf http://ed-merks.blogspot.com http://www.peterfriese.de Thursday, March 26, 2009

“The Learning Curve is Too Steep” Thursday, March 26, 2009

“The Learning Curve is Too Steep” • Use newsgroups Thursday, March 26, 2009

“The Learning Curve is Too Steep” • Use newsgroups • Get Trained: Eclipse Training Alliance Thursday, March 26, 2009

“The Learning Curve is Too Steep” • Use newsgroups • Get Trained: Eclipse Training Alliance • Consult with someone who knows Thursday, March 26, 2009

“UML is Way Too Complex” Thursday, March 26, 2009

“UML is Way Too Complex” UML 1: 9 diagram types Thursday, March 26, 2009

“UML is Way Too Complex” UML 1: 9 diagram types UML 2: 13 diagram types Thursday, March 26, 2009

“UML is Way Too Complex” UML 1: 9 diagram types UML 2: 13 diagram types Complex underlying structure Thursday, March 26, 2009

“UML is Way Too Complex” UML 1: 9 diagram types UML 2: 13 diagram types Complex underlying structure UML ≠ Modeling Thursday, March 26, 2009

“UML is Way Too Complex” UML 1: 9 diagram types UML 2: 13 diagram types Complex underlying structure UML ≠ Modeling You don’t need to use it! Thursday, March 26, 2009

So What is Modeling Anyway? Basically a model is a simpliﬁed abstract view of the complex reality (Wikipedia) Thursday, March 26, 2009

It’s about simplicity! Basically a model is a simpliﬁed abstract view of the complex reality (Wikipedia) Thursday, March 26, 2009

It’s about simplicity! Basically a model is a simpliﬁed abstract view of the complex reality (Wikipedia) Car color maxSpeed startEngine accelerate stopEngine brake Thursday, March 26, 2009

“Oh, That’s Too Abstract For Me!” Thursday, March 26, 2009

“Oh, That’s Too Abstract For Me!” Abstraction is the process [...] of reducing the information content of a concept [...] to retain only information which is relevant for a particular purpose. Thursday, March 26, 2009

@SuppressWarnings(quot;serialquot;) @Entity @Table(name = quot;CUSTOMER_INFOquot;) public class CustomerInfo implements Serializable { @Id @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = quot;idSeqquot;) @SequenceGenerator(name = quot;idSeqquot;, sequenceName = quot;CUST_SEQquot;, allocationSize = 1) @Column(name = quot;CUST_IDquot;, nullable = false) private String customerId; public void setCustomerId(String customerId) { this.customerId = customerId; } public String getCustomerId() { return customerId; } @Column(name = quot;EMAILquot;, nullable = false, length = 128) private String emailAddress; public String getEmailAddress() { return emailAddress; } public void setEmailAddress(String emailAddress) { String oldValue = emailAddress; this.emailAddress = emailAddress; firePropertyChangedEvent(quot;emailAddressquot;, oldValue, this.emailAddress); } Thursday, March 26, 2009

entity CustomerInfo (id=CUST_ID, sequenceName=CUST_SEQ) { String emailAddress (notNull, length = 128) } Thursday, March 26, 2009

entity CustomerInfo (id=CUST_ID, sequenceName=CUST_SEQ) { String emailAddress (notNull, length = 128) } This actually is a model! Thursday, March 26, 2009

entity CustomerInfo (id=CUST_ID, sequenceName=CUST_SEQ) { String emailAddress (notNull, length = 128) } This actually is a model! Don’t believe? Come to the Xtext BOF. Thursday, March 26, 2009

Models Can Take Different Shapes Basically a model is a simpliﬁed abstract view of the complex reality (Wikipedia) !quot;#$%&'()*+quot;,-)+./0(+123'$+24 ....!quot;#$%#+56+/&+4 ......!quot;#$%+*+(+/7. ......../0(+12&89*$:+/2. ........7-)+127:++%3'$+2. ........(9/;&&6:#12<2 ........(0quot;;&&6:#126/='6/$+$2. ........+&':+%'))'#97+12)0:+/72>4 ....!>quot;#$%#+56+/&+4 !quot;#$%&'%()*+,-&*'./0*'1 ....!quot;#$%077:9=67+. ....../0(+12*0=+*2. ''2)+%(3'3*)4-#*$567 ......7-)+12quot;#$%#7:9/?2>4 ''8/%0'9*)4-#*$52)+%(3'8-$quot;*67 !>quot;#$%&'()*+quot;,-)+4 ''4%9):./0*;'3*)<=%$0+*(567 ''./0*'3*)>-+*()567 ''8/%0'9*)>-+*()5./0*'8-$quot;*67 ?'@@'./0* 0..1 parent Node label: EString 0..* children Thursday, March 26, 2009

Models Can Take Different Shapes Basically a model is a simpliﬁed abstract view of the complex reality (Wikipedia) !quot;#$%&'()*+quot;,-)+./0(+123'$+24 ....!quot;#$%#+56+/&+4 ......!quot;#$%+*+(+/7. 0..1 ......../0(+12&89*$:+/2. parent ........7-)+127:++%3'$+2. Node ........(9/;&&6:#12<2 label: EString ........(0quot;;&&6:#126/='6/$+$2. ........+&':+%'))'#97+12)0:+/72>4 0..* ....!>quot;#$%#+56+/&+4 children ....!quot;#$%077:9=67+. ....../0(+12*0=+*2. !quot;#$%&'%()*+,-&*'./0*'1 ......7-)+12quot;#$%#7:9/?2>4 !>quot;#$%&'()*+quot;,-)+4 ''2)+%(3'3*)4-#*$567 ''8/%0'9*)4-#*$52)+%(3'8-$quot;*67 ''4%9):./0*;'3*)<=%$0+*(567 ''./0*'3*)>-+*()567 ''8/%0'9*)>-+*()5./0*'8-$quot;*67 ?'@@'./0* Thursday, March 26, 2009

Models Can Take Different Shapes Basically a model is a simpliﬁed abstract view of the complex reality (Wikipedia) 0..1 parent Node label: EString 0..* children !quot;#$%&'%()*+,-&*'./0*'1 ''2)+%(3'3*)4-#*$567 !quot;#$%&'()*+quot;,-)+./0(+123'$+24 ''8/%0'9*)4-#*$52)+%(3'8-$quot;*67 ''4%9):./0*;'3*)<=%$0+*(567 ....!quot;#$%#+56+/&+4 ''./0*'3*)>-+*()567 ''8/%0'9*)>-+*()5./0*'8-$quot;*67 ?'@@'./0* ......!quot;#$%+*+(+/7. ......../0(+12&89*$:+/2. ........7-)+127:++%3'$+2. ........(9/;&&6:#12<2 ........(0quot;;&&6:#126/='6/$+$2. ........+&':+%'))'#97+12)0:+/72>4 ....!>quot;#$%#+56+/&+4 ....!quot;#$%077:9=67+. ....../0(+12*0=+*2. ......7-)+12quot;#$%#7:9/?2>4 !>quot;#$%&'()*+quot;,-)+4 Thursday, March 26, 2009

Models Can Take Different Shapes Basically a model is a simpliﬁed abstract view of the complex reality (Wikipedia) !quot;#$%&'%()*+,-&*'./0*'1 ''2)+%(3'3*)4-#*$567 ''8/%0'9*)4-#*$52)+%(3'8-$quot;*67 ''4%9):./0*;'3*)<=%$0+*(567 !quot;#$%&'()*+quot;,-)+./0(+123'$+24 ''./0*'3*)>-+*()567 ....!quot;#$%#+56+/&+4 ''8/%0'9*)>-+*()5./0*'8-$quot;*67 ......!quot;#$%+*+(+/7. 0..1 ?'@@'./0* ......../0(+12&89*$:+/2. parent ........7-)+127:++%3'$+2. Node ........(9/;&&6:#12<2 label: EString ........(0quot;;&&6:#126/='6/$+$2. ........+&':+%'))'#97+12)0:+/72>4 0..* ....!>quot;#$%#+56+/&+4 children ....!quot;#$%077:9=67+. ....../0(+12*0=+*2. ......7-)+12quot;#$%#7:9/?2>4 !>quot;#$%&'()*+quot;,-)+4 Thursday, March 26, 2009

EMF Acts as a Hub for Models !quot;#$%&'()*+quot;,-)+./0(+123'$+24 ....!quot;#$%#+56+/&+4 0..1 ......!quot;#$%+*+(+/7. parent ......../0(+12&89*$:+/2. Node ........7-)+127:++%3'$+2. label: EString ........(9/;&&6:#12<2 ........(0quot;;&&6:#126/='6/$+$2. ........+&':+%'))'#97+12)0:+/72>4 0..* ....!>quot;#$%#+56+/&+4 children ....!quot;#$%077:9=67+. ....../0(+12*0=+*2. ......7-)+12quot;#$%#7:9/?2>4 !>quot;#$%&'()*+quot;,-)+4 !quot;#$%&'%()*+,-&*'./0*'1 ''2)+%(3'3*)4-#*$567 ''8/%0'9*)4-#*$52)+%(3'8-$quot;*67 ''4%9):./0*;'3*)<=%$0+*(567 ''./0*'3*)>-+*()567 ''8/%0'9*)>-+*()5./0*'8-$quot;*67 ?'@@'./0* Thursday, March 26, 2009

“All This Buzz About Meta - It Drives Me Crazy!” Thursday, March 26, 2009

Don’t Panic. Thursday, March 26, 2009

Meta = Description aNode1 label: quot;carquot; 0..1 parent aNode2 Node label: quot;wheelquot; label: EString aNode3 0..* label: quot;wheelquot; children aNode4 label: quot;wheelquot; aNode5 label: quot;wheelquot; Thursday, March 26, 2009

Meta = Description aNode1 label: quot;carquot; 0..1 parent aNode2 Node label: quot;wheelquot; label: EString aNode3 0..* label: quot;wheelquot; children aNode4 label: quot;wheelquot; aNode5 label: quot;wheelquot; Description Instance Thursday, March 26, 2009

“Modeling is Too Restrictive...” http://www.ﬂickr.com/photos/two-wrongs/205467442/ “...it will limit my creativity” Thursday, March 26, 2009

Let’s Talk About Creativity Thursday, March 26, 2009

Let’s Talk About Creativity How To Create A Bean Class With A Simple Property – Create an interface to represent the API for X • A method to get the value of y • A method to set the value of y – A class to implement that API for X • A variable to store the state for y • Code to initialize the default value • A method to get the value of y • A method to set the value of y – A factory interface for creating instances • A method to create an instance of X – An class to implement the factory interface • A method to create an instance of the class for X Thursday, March 26, 2009

Tedium is the True Killer of Creativity manually written code Frameworks schematic code (manually written) Libraries Thursday, March 26, 2009

Code Generation Kills Tedium Model manually written code Generator Frameworks schematic code (generated) Libraries Thursday, March 26, 2009

How Code Generation Works Step 1: capture knowledge Thursday, March 26, 2009

How Code Generation Works Step 1: capture knowledge Eclipse Guru Generator Thursday, March 26, 2009

How Code Generation Works Step 1: capture knowledge Thursday, March 26, 2009

How Code Generation Works Step 1: capture knowledge Step 2: provide model Thursday, March 26, 2009

How Code Generation Works Step 1: capture knowledge Step 2: provide model entity CustomerInfo (id=CUST_ID, sequenceName=CUST_SEQ) { String emailAddress (notNull, length = 128) } Thursday, March 26, 2009

How Code Generation Works Step 1: capture knowledge Step 2: provide model Step 3: generate code entity CustomerInfo (id=CUST_ID, sequenceName=CUST_SEQ) { String emailAddress (notNull, length = 128) } Thursday, March 26, 2009

How Code Generation Works Step 1: capture knowledge Step 2: provide model Step 3: generate code @SuppressWarnings(quot;serialquot;) @Entity @Table(name = quot;CUSTOMER_INFOquot;) public class CustomerInfo implements Serializable { @Id @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = quot;idSeqquot;) @SequenceGenerator(name = quot;idSeqquot;, sequenceName = quot;CUST_SEQquot;, allocationSize = 1) @Column(name = quot;CUST_IDquot;, nullable = false) private String customerId; public void setCustomerId(String customerId) { this.customerId = customerId; } public entity CustomerInfo String getCustomerId() { (id=CUST_ID, sequenceName=CUST_SEQ) { return customerId; } String emailAddress (notNull, length = 128) } @Column(name = quot;EMAILquot;, nullable = false, length = 128) private String emailAddress; public String getEmailAddress() { return emailAddress; } public void setEmailAddress(String emailAddress) { String oldValue = emailAddress; this.emailAddress = emailAddress; firePropertyChangedEvent(quot;emailAddressquot;, oldValue, this.emailAddress); } Thursday, March 26, 2009

“Ok, But Generated Code Sucks” Thursday, March 26, 2009

“Ok, But Generated Code Sucks” Oh, really?! Thursday, March 26, 2009

“Ok, But Generated Code Sucks” Thursday, March 26, 2009

“Ok, But Generated Code Sucks” • YOU write the code generator Thursday, March 26, 2009

“Ok, But Generated Code Sucks” • YOU write the code generator • YOU are responsible for code quality Thursday, March 26, 2009

“Ok, But Generated Code Sucks” • YOU write the code generator • YOU are responsible for code quality • YOU are responsible for performance Thursday, March 26, 2009

“Ok, But Generated Code Sucks” • YOU write the code generator • YOU are responsible for code quality • YOU are responsible for performance • Template Languages have matured Thursday, March 26, 2009

“Ok, But Generated Code Sucks” • YOU write the code generator • YOU are responsible for code quality • YOU are responsible for performance • Template Languages have matured • JET / Acceleo / Xpand Thursday, March 26, 2009

“Diagrams Suck” Thursday, March 26, 2009

“Diagrams Suck” • Use wisely! Thursday, March 26, 2009

“Diagrams Suck” • Use wisely! • Domain Speciﬁc Diagrams :-) Thursday, March 26, 2009

“Diagrams Suck” • Use wisely! • Domain Speciﬁc Diagrams :-) • Overview :-) Thursday, March 26, 2009

“Diagrams Suck” • Use wisely! • Domain Speciﬁc Diagrams :-) • Overview :-) • Reverse Engineering :-( Thursday, March 26, 2009

“DSLs will create a Tower of Babel” Thursday, March 26, 2009

“DSLs will create a Tower of Babel” Will domain experts write programs? Thursday, March 26, 2009

“DSLs will create a Tower of Babel” Will domain experts write programs? No - but they will be able to read them! Thursday, March 26, 2009

“DSLs will create a Tower of Babel” Will domain experts write programs? No - but they will be able to read them! Language barriers get torn down ! Thursday, March 26, 2009

“Modeling Enforces Onerous Processes” http://www.ﬂickr.com/photos/orvaratli/2620988946/ Thursday, March 26, 2009

“Modeling Enforces Onerous Processes” Thursday, March 26, 2009

“Modeling Enforces Onerous Processes” Modeling is just a tool Thursday, March 26, 2009

“Modeling Enforces Onerous Processes” Modeling is just a tool Tools are orthogonal to your process Thursday, March 26, 2009

“Modeling Enforces Onerous Processes” Modeling is just a tool Tools are orthogonal to your process Modeling can be use with any kind of process Thursday, March 26, 2009

“Modeling is Just a Marketing Ploy” Thursday, March 26, 2009

“Modeling is Just a Marketing Ploy” Expensive tools Thursday, March 26, 2009

“Modeling is Just a Marketing Ploy” Expensive tools Vendor lock-in Thursday, March 26, 2009

“Modeling is Just a Marketing Ploy” Expensive tools Vendor lock-in Expensive support contracts Thursday, March 26, 2009

“Modeling is Just a Marketing Ploy” Expensive tools Vendor lock-in Expensive support contracts Incompatible versions Thursday, March 26, 2009

“Modeling is Just a Marketing Ploy” Can you say “Open Source”? SD Times rates EMF “Top Shelf” (http://www.sdtimes.com/content/article.aspx?ArticleID=32287) Thursday, March 26, 2009

“Modeling Will Make Me Redundant” Thursday, March 26, 2009

Three Things To Take Home Thursday, March 26, 2009

Three Things To Take Home Generated code is as good as the effort you put into the Generator Thursday, March 26, 2009

Three Things To Take Home Generated code is as good as the effort you put into the Generator The Eclipse Modeling Project provides a great tool stack - for free! Thursday, March 26, 2009

Three Things To Take Home Generated code is as good as the effort you put into the Generator The Eclipse Modeling Project provides a great tool stack - for free! Modeling will set your creativity free! Thursday, March 26, 2009

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The Unbearable Stupidity of Modeling

by Peter Friese

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