Jeg har så vondt i mvn JavaBin, 10. mars, 2011 Johannes Brodwall

Jeg har så vondt i mvn

JavaBin, 10. mars, 2011

Johannes Brodwall

mvn intro

mvn introarchetype:generate

test – package – install – deploy

eclipse:eclipse/idea:idea

$ mvn archetype:generate

[INFO] Scanning for projects...

[INFO] Searching repository for plugin with prefix: 'archetype'.

[INFO] ------------------------------------------------------------------------

[INFO] Building Maven Default Project

[INFO] task-segment: [archetype:generate] (aggregator-style)

[INFO] ------------------------------------------------------------------------

[INFO] Preparing archetype:generate

[INFO] No goals needed for project - skipping

[hoose archetype:

….

[hoose archetype:

1: remote -> docbkx-quickstart-archetype (-)

2: remote -> multi (-)

3: remote -> simple (-)

...

101: remote -> maven-archetype-quickstart (An archetype which contains a sample Maven project.)

...

375: remote -> javg-minimal-archetype (-)

Choose a number: 101: 101

Choose version:

... 6: 1.1

Choose a number: 6:

Define value for property 'groupId': : no.steria.demo

Define value for property 'artifactId': : maven-demo

Define value for property 'version': 1.0-SNAPSHOT:

Define value for property 'package': no.steria.demo:

Confirm properties configuration:

groupId: no.steria.demo

artifactId: maven-demo

version: 1.0-SNAPSHOT

package: no.steria.demo

Y:

[INFO] project created from Old (1.x) Archetype in dir: C:\Users\johannes\workspace\tmp\maven-demo

[INFO] ------------------------------------------------------------------------

[INFO] BUILD SUCCESSFUL

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 20 seconds

[INFO] Finished at: Thu Mar 10 08:42:16 CET 2011

[INFO] Final Memory: 19M/154M

[INFO] ------------------------------------------------------------------------

/** * Unit test for simple App. */public class AppTest extends TestCase{ /** * Create the test case * * @param testName name of the test case */ public AppTest( String testName ) { super( testName ); }

/** * @return the suite of tests being tested */ public static Test suite() { return new TestSuite( AppTest.class ); }

/** * Rigourous Test :-) */ public void testApp() { assertTrue( true ); }}

mvn introarchetype:generate

test – package – install – deploy

eclipse:eclipse/idea:idea

mvn introarchetype:generate

test – package – install – deploy

eclipse:eclipse/idea:idea

$ mvn deploy[INFO] Scanning for projects...

[INFO] ------------------------------------------------------------------------

[INFO] Building maven-demo

[INFO] task-segment: [deploy]

[INFO] ------------------------------------------------------------------------

[INFO] [resources:resources {execution: default-resources}]

[INFO] [compiler:compile {execution: default-compile}]

[INFO] [resources:testResources {execution: default-testResources}]

[INFO] [compiler:testCompile {execution: default-testCompile}]

[INFO] [surefire:test {execution: default-test}]

-------------------------------------------------------

T E S T S

-------------------------------------------------------

Running no.steria.demo.AppTest

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.029 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

compile

test-compile

test

[INFO] [jar:jar {execution: default-jar}]

[INFO] [install:install {execution: default-install}]

[INFO] Installing ...\maven-demo\target\maven-demo-1.0-SNAPSHOT.jar to

$HOME\.m2\repository\ no\steria\demo\maven-demo\ 1.0-SNAPSHOT\maven-demo-1.0-SNAPSHOT.jar

[INFO] [deploy:deploy {execution: default-deploy}]

Uploading: scp:foo@bar.com:.../maven-demo-1.0-20110310.075455-2.jar

[INFO] ------------------------------------------------------------------------

[INFO] BUILD SUCCESSFUL

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 4 seconds

[INFO] Finished at: Thu Mar 10 08:54:56 CET 2011

[INFO] Final Memory: 19M/154M

[INFO] ------------------------------------------------------------------------

package

install

deploy

mvn introarchetype:generate

test – package – install – deploy

eclipse:eclipse/idea:idea

mvn introarchetype:generate

test – package – install – deploy

eclipse:eclipse/idea:idea

$ mvn eclipse:eclipse[INFO] Scanning for projects...

[INFO] Searching repository for plugin with prefix: 'eclipse'.

[INFO] ------------------------------------------------------------------------

[INFO] Building maven-demo

[INFO] task-segment: [eclipse:eclipse]

[INFO] ------------------------------------------------------------------------

[INFO] Preparing eclipse:eclipse

[INFO] No goals needed for project - skipping

[INFO] [eclipse:eclipse {execution: default-cli}]

[INFO] Using Eclipse Workspace: C:\Users\johannes\workspace

[INFO] Adding default classpath container: org.eclipse.jdt.launching.JRE_CONTAINER

[INFO] Not writing settings - defaults suffice

[INFO] Wrote Eclipse project for "maven-demo" to C:\Users\johannes\workspace\tmp\maven-demo.

[INFO]

Sources for some artifacts are not available.

Please run the same goal with the -DdownloadSources=true parameter in order to check remote repositories for sour

ces.

List of artifacts without a source archive:

o junit:junit:3.8.1

[INFO] ------------------------------------------------------------------------

[INFO] BUILD SUCCESSFUL

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 2 seconds

[INFO] Finished at: Thu Mar 10 09:02:56 CET 2011

[INFO] Final Memory: 15M/155M

[INFO] ------------------------------------------------------------------------

-DdownloadSources

mvn basicsSNAPSHOT vs release-versions

repositories

modules

Jeg har så vondt i mvn

Jeg har så vondt i mvn

Transitive dependencies

Fragmenterte prosjekter

Plugin overbruk

Dependency nightmare

$ mvn dependency:tree[INFO] Scanning for projects...

[INFO] Searching repository for plugin with prefix: 'dependency'.

[INFO] ------------------------------------------------------------------------

[INFO] Building maven-demo

[INFO] task-segment: [dependency:tree]

[INFO] ------------------------------------------------------------------------

[INFO] [dependency:tree {execution: default-cli}]

[INFO] no.steria.demo:maven-demo:jar:1.0-SNAPSHOT

[INFO] \- commons-logging:commons-logging:jar:1.1:compile

[INFO] +- log4j:log4j:jar:1.2.12:compile

[INFO] +- logkit:logkit:jar:1.0.1:compile

[INFO] +- avalon-framework:avalon-framework:jar:4.1.3:compile

[INFO] \- javax.servlet:servlet-api:jar:2.3:compile

Servlet-api!?!!

<dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1</version> <type>jar</type> <scope>compile</scope> <exclusions> <exclusion> <artifactId>servlet-api</artifactId> <groupId>javax.servlet</groupId> </exclusion> </exclusions></dependency>

“And Maven brought forth a Plague of Apache commons,

and there was a flood of all the Libraries of the Internet as a Judgment upon the people”

-Dan North, QCon London 2010

\- net.sourceforge.htmlunit:htmlunit:jar:2.8:compile

+- xalan:xalan:jar:2.7.1:compile

| \- xalan:serializer:jar:2.7.1:compile

+- commons-collections:commons-collections:jar:3.2.1:compile

+- commons-lang:commons-lang:jar:2.4:compile

+- org.apache.httpcomponents:httpclient:jar:4.0.1:compile

| \- org.apache.httpcomponents:httpcore:jar:4.0.1:compile

+- org.apache.httpcomponents:httpmime:jar:4.0.1:compile

| \- org.apache.james:apache-mime4j:jar:0.6:compile

+- commons-codec:commons-codec:jar:1.4:compile

+- net.sourceforge.htmlunit:htmlunit-core-js:jar:2.8:compile

+- xerces:xercesImpl:jar:2.9.1:compile

| \- xml-apis:xml-apis:jar:1.3.04:compile

+- net.sourceforge.nekohtml:nekohtml:jar:1.9.14:compile

+- net.sourceforge.cssparser:cssparser:jar:0.9.5:compile

| \- org.w3c.css:sac:jar:1.3:compile

+- commons-io:commons-io:jar:1.4:compile

\- commons-logging:commons-logging:jar:1.1.1:compile

Xerces

Xalan? Hmm...

Én metode fra commons-lang

Commons-logging….

Og én fra commons-io

Én fra commons-coll

Dependency nightmare

Excludes

Vote with your feet

Make it better: Avoid reuse

Fragmenterte prosjekter

\- org.eclipse.jetty:jetty-plus:jar:8.0.0.M2:compile

+- org.apache.geronimo.specs:geronimo-jta_1.1_spec:jar:1.1.1:compile

+- org.eclipse.jetty:jetty-webapp:jar:8.0.0.M2:compile

| +- org.eclipse.jetty:jetty-xml:jar:8.0.0.M2:compile

| | \- org.eclipse.jetty:jetty-util:jar:8.0.0.M2:compile

| \- org.eclipse.jetty:jetty-servlet:jar:8.0.0.M2:compile

| \- org.eclipse.jetty:jetty-security:jar:8.0.0.M2:compile

| \- org.eclipse.jetty:jetty-server:jar:8.0.0.M2:compile

| +- org.mortbay.jetty:servlet-api:jar:3.0.20100224:compile

| +- org.eclipse.jetty:jetty-continuation:jar:8.0.0.M2:compile

| \- org.eclipse.jetty:jetty-http:jar:8.0.0.M2:compile

| \- org.eclipse.jetty:jetty-io:jar:8.0.0.M2:compile

\- org.eclipse.jetty:jetty-jndi:jar:8.0.0.M2:compile

\- javax.mail:mail:jar:1.4.1:compile

12 moduler? Virkelig?

mvn-release-plugin

liker ikke SNAPSHOTs

Hvor ligger PersonDAO?

no.steria.person?

no.steria.dao?

Konsistens?

Koherens?

\- org.eclipse.jetty:jetty-plus:jar:8.0.0.M2:compile

+- org.eclipse.jetty:jetty-webapp:jar:8.0.0.M2:compile

\- org.eclipse.jetty:jetty-servlet:jar:8.0.0.M2:compile

\- org.eclipse.jetty:jetty-server:jar:8.0.0.M2:compile

\- org.eclipse.jetty:jetty-http:jar:8.0.0.M2:compile

\- org.eclipse.jetty:jetty-io:jar:8.0.0.M2:compile

Eksempel: Du skal lage støtte for NIO. Hvor?

Når splitter du prosjekter?

Kun for deployment-behov!

Kun for deployment-behov!

\- no.steria.demo:demo-server-package:jar +- no.steria.demo:demo-web:war +- no.steria.demo:demo-core:jar \- no.steria.demo:demo-client:jar \- no.steria.demo:demo-core:jar (duplikat)

Fragmenterte prosjekter

Koherens > Konsistens

Unngå å splitte

Deployment kan kreve splitt

Plugins

Plugins

Java > Mvn plugins

antrun-plugin

Main-klasser

<plugins> <plugin> <groupId>org.mortbay.jetty</groupId>

<artifactId>maven-jetty-plugin</artifactId> <version>6.1.10</version> <configuration> <scanIntervalSeconds>10</scanIntervalSeconds> <stopKey>foo</stopKey> <stopPort>9999</stopPort> </configuration> <executions> <execution> <id>start-jetty</id> <phase>pre-integration-test</phase> <goals> <goal>run</goal> </goals> <configuration> <scanIntervalSeconds>0</scanIntervalSeconds> <daemon>true</daemon> </configuration> </execution> <execution> <id>stop-jetty</id> <phase>post-integration-test</phase> <goals> <goal>stop</goal> </goals> </execution> </executions> </plugin>

Portnummer?

Jetty versjon?

Data sources?

Debugging?

Flere kontekster?

Integrasjon med tester?

import org.eclipse.jetty.plus.jndi.EnvEntry;import org.eclipse.jetty.server.Server;import org.eclipse.jetty.webapp.WebAppContext;

…

new EnvEntry(jndiDataSource, dataSource);Server server = new Server(0);server.setHandler( new WebAppContext("src/main/webapp", "/myapp"));server.start();

int localPort = server.getConnectors()[0].getLocalPort();

int localPort = server.getConnectors()[0].getLocalPort();String baseUrl = "http://localhost:" + localPort + "/";

WebDriver browser = createWebDriver();browser.get(baseUrl);browser.findElement( By.linkText("Create person")).click();browser.findElement( By.name("first_name")).sendKeys("Darth");browser.findElement( By.name("last_name")).sendKeys("Vader");browser.findElement( By.name("createPerson")).click();

<plugin> <artifactId>maven-antrun-plugin</artifactId> <executions> <execution> <configuration> <tasks> <property name="compile_classpath" refid="maven.compile.classpath" /> <java classname="fitnesse.Shutdown" fork="true"> <arg line="-p ${fitnesse.port}" /> <classpath> <pathelement path="${compile_classpath}" /> </classpath> </java> <java classname="fitnesseMain.FitNesseMain" fork="true" spawn="${fitnesse.spawn}"> <arg line="-p ${fitnesse.port}" /> <classpath> <pathelement path="${compile_classpath}" /> </classpath> </java> </tasks> </configuration> </execution> </executions></plugin>

<property name=“mvn_cp" refid="maven.compile.classpath" /><java classname="fitnesseMain.FitNesseMain" fork="true" spawn="true"> <arg line="-p ${fitnesse.port}" /> <classpath> <pathelement path="${mvn_cp}" /> </classpath></java>

Plugins

Java > Mvn plugins

antrun-plugin

Main-klasser

Oppsummering

Oppsummering

Den som spiser pølsemat (transitive deps)

og kjøttmat (fragmenterte prosjekt)

hele dagen

Han blir så doven og så lat

og får så vondt i mvn

Oppsummering

Meeeeen…

den som spiser gullerøtter (excludes)

knekkebrød (dependency:tree)

og peppernøtter (koherens),

tyttebær (mvn-antrun-plugin)

og bjørnebær (main klasser)

og kålrot (sammenhengende moduler)

og persille (Java-kode)

han blir så passe mett i magen,

glad og lystig hele dagen

og så lett i bena at han nesten ikke kan stå stille.

Takk for oppmerksomheten

johannes@brodwall.com

http://johannesbrodwall.com

http://sterkblanding.no

twitter.com/jhannes