Java modules

Java Modules
(why your stuff stopped working)
@bbdsoftware
@rorypreddy

Meet Rory
• Developer in R&D team at BBD
• Organizer for the Java and AWS User groups
• Not related to Tyrion Lannister
• Don’t do kids parties
@rorypreddy

Agenda
• Introduction
• Modules 101
• Jlink
• Demo
• Migrating to Java 9+

common/hadoop-common-3.0.0-SNAPSHOT.jar:common/hadoop-nfs-3.0.0-SNAPSHOT.jar:common/lib/activation-1.1.jar:common/lib/apacheds-i
18n-2.0.0-M15.jar:common/lib/apacheds-kerberos-codec-2.0.0-M15.jar:common/lib/api-asn1-api-1.0.0-M20.jar:common/lib/api-util-1.0
.0-M20.jar:common/lib/asm-3.2.jar:common/lib/avro-1.7.4.jar:common/lib/commons-beanutils-1.7.0.jar:common/lib/commons-beanutils-
core-1.8.0.jar:common/lib/commons-cli-1.2.jar:common/lib/commons-codec-1.4.jar:common/lib/commons-collections-3.2.1.jar:common/l
ib/commons-compress-1.4.1.jar:common/lib/commons-configuration-1.6.jar:common/lib/commons-digester-1.8.jar:common/lib/commons-ht
tpclient-3.1.jar:common/lib/commons-io-2.4.jar:common/lib/commons-lang-2.6.jar:common/lib/commons-logging-1.1.3.jar:common/lib/c
ommons-math3-3.1.1.jar:common/lib/commons-net-3.1.jar:common/lib/curator-client-2.7.1.jar:common/lib/curator-framework-2.7.1.jar
:common/lib/curator-recipes-2.7.1.jar:common/lib/gson-2.2.4.jar:common/lib/guava-11.0.2.jar:common/lib/hadoop-annotations-3.0.0-
SNAPSHOT.jar:common/lib/hadoop-auth-3.0.0-SNAPSHOT.jar:common/lib/hamcrest-core-1.3.jar:common/lib/htrace-core4-4.0.1-incubating
.jar:common/lib/httpclient-4.2.5.jar:common/lib/httpcore-4.2.5.jar:common/lib/jackson-core-asl-1.9.13.jar:common/lib/jackson-jax
rs-1.9.13.jar:common/lib/jackson-mapper-asl-1.9.13.jar:common/lib/jackson-xc-1.9.13.jar:common/lib/java-xmlbuilder-0.4.jar:commo
n/lib/jaxb-api-2.2.2.jar:common/lib/jaxb-impl-2.2.3-1.jar:common/lib/jcip-annotations-1.0.jar:common/lib/jersey-core-1.9.jar:com
mon/lib/jersey-json-1.9.jar:common/lib/jersey-server-1.9.jar:common/lib/jets3t-0.9.0.jar:common/lib/jettison-1.1.jar:common/lib/
jetty-6.1.26.jar:common/lib/jetty-util-6.1.26.jar:common/lib/jsch-0.1.51.jar:common/lib/json-smart-1.1.1.jar:common/lib/jsp-api-
2.1.jar:common/lib/jsr305-3.0.0.jar:common/lib/junit-4.11.jar:common/lib/log4j-1.2.17.jar:common/lib/mockito-all-1.8.5.jar:commo
n/lib/netty-3.6.2.Final.jar:common/lib/nimbus-jose-jwt-3.9.jar:common/lib/paranamer-2.3.jar:common/lib/protobuf-java-2.5.0.jar:c
ommon/lib/servlet-api-2.5.jar:common/lib/slf4j-api-1.7.10.jar:common/lib/slf4j-log4j12-1.7.10.jar:common/lib/snappy-java-1.0.4.1
.jar:common/lib/stax-api-1.0-2.jar:common/lib/xmlenc-0.52.jar:common/lib/xz-1.0.jar:common/lib/zookeeper-3.4.6.jar:hdfs/hadoop-h
dfs-3.0.0-SNAPSHOT.jar:hdfs/hadoop-hdfs-nfs-3.0.0-SNAPSHOT.jar:hdfs/lib/commons-daemon-1.0.13.jar:hdfs/lib/hadoop-hdfs-client-3.
0.0-SNAPSHOT.jar:hdfs/lib/hpack-0.11.0.jar:hdfs/lib/leveldbjni-all-1.8.jar:hdfs/lib/netty-all-4.1.0.Beta5.jar:hdfs/lib/okhttp-2.
4.0.jar:hdfs/lib/okio-1.4.0.jar:hdfs/lib/xercesImpl-2.9.1.jar:mapreduce/hadoop-mapreduce-client-app-3.0.0-SNAPSHOT.jar:mapreduce
/hadoop-mapreduce-client-common-3.0.0-SNAPSHOT.jar:mapreduce/hadoop-mapreduce-client-core-3.0.0-SNAPSHOT.jar:mapreduce/hadoop-ma
preduce-client-hs-3.0.0-SNAPSHOT.jar:mapreduce/hadoop-mapreduce-client-hs-plugins-3.0.0-SNAPSHOT.jar:mapreduce/hadoop-mapreduce-
client-jobclient-3.0.0-SNAPSHOT.jar:mapreduce/hadoop-mapreduce-client-nativetask-3.0.0-SNAPSHOT.jar:mapreduce/hadoop-mapreduce-c
lient-shuffle-3.0.0-SNAPSHOT.jar:mapreduce/hadoop-mapreduce-examples-3.0.0-SNAPSHOT.jar:yarn/hadoop-yarn-api-3.0.0-SNAPSHOT.jar:
yarn/hadoop-yarn-applications-distributedshell-3.0.0-SNAPSHOT.jar:yarn/hadoop-yarn-applications-unmanaged-am-launcher-3.0.0-SNAP
SHOT.jar:yarn/hadoop-yarn-client-3.0.0-SNAPSHOT.jar:yarn/hadoop-yarn-common-3.0.0-SNAPSHOT.jar:yarn/hadoop-yarn-registry-3.0.0-S
NAPSHOT.jar:yarn/hadoop-yarn-server-applicationhistoryservice-3.0.0-SNAPSHOT.jar:yarn/hadoop-yarn-server-common-3.0.0-SNAPSHOT.j
ar:yarn/hadoop-yarn-server-nodemanager-3.0.0-SNAPSHOT.jar:yarn/hadoop-yarn-server-resourcemanager-3.0.0-SNAPSHOT.jar:yarn/hadoop
-yarn-server-sharedcachemanager-3.0.0-SNAPSHOT.jar:yarn/hadoop-yarn-server-web-proxy-3.0.0-SNAPSHOT.jar:yarn/lib/aopalliance-1.0
.jar:yarn/lib/commons-math-2.2.jar:yarn/lib/curator-test-2.7.1.jar:yarn/lib/fst-2.24.jar:yarn/lib/guice-3.0.jar:yarn/lib/guice-s
ervlet-3.0.jar:yarn/lib/javassist-3.18.1-GA.jar:yarn/lib/javax.inject-1.jar:yarn/lib/jersey-client-1.9.jar:yarn/lib/jersey-guice
-1.9.jar:yarn/lib/objenesis-2.1.jar
Classpathhell

JigSaw
2011
JSR-294
Improved
Modularity
Support
2006
Java 7:
No JigSaw
Java 8:
No JigSaw
JSR-376
Java Platform
Module
System
JSR-277
Java
Module
System
2005
JSR-291
'OSGi 4.1'
2014

Java modules

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