JaVers dependency on Google Guava

[shirishpandharikar]

As documented I just ran the below code to view the diff. It seems that Google Guava is required as a runtime dependency for the below code to work.

Javers javers = JaversBuilder.javers().build();
Person tommyOld = new Person("tommy", "Tommy Smart");
Person tommyNew = new Person("tommy", "Tommy C. Smart");

Diff diff = javers.compare(tommyOld, tommyNew);
System.out.println(diff.prettyPrint());

The code above throws an exception as shown below:

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableMap
	at org.javers.core.Changes.<init>(Changes.java:35)
	at org.javers.core.diff.Diff.groupByObject(Diff.java:88)
	at org.javers.core.diff.Diff.toString(Diff.java:129)
	at org.javers.core.diff.Diff.prettyPrint(Diff.java:120)
	...
Caused by: java.lang.ClassNotFoundException: com.google.common.collect.ImmutableMap
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 5 more

Not sure how the below line of code is used in org.javers.core.Changes.java
There are 3 more references in other classes HibernateConfig.java, JaversSpringJpaApplicationConfig.java and JaversSpringMongoApplicationConfig.java

The above code can be easily replaced with standard Java code to remove dependency on Goolge Guava.

Do let me know if these changes can be done. I will submit a PR.

[bartoszwalacik]

Thanks for reporting. You are right, there should be no references to Guava in javers-core classes (except of org.javers.guava package). Guava is the optional dependency:

optional "com.google.guava:guava:$guavaVersion"

and should not be required. I will be happy if you contribute a PR to fix it.

[bartoszwalacik]

released in 3.11.0

[PodusovMaxim]

Hi!
I have same problem with guava stream:
java.lang.reflect.InvocationTargetException java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at org.javers.common.reflection.ReflectionUtil.newInstance(ReflectionUtil.java:89) .. 64 more Caused by: java.lang.NoClassDefFoundError: com/google/common/collect/Streams at org.javers.common.collections.Primitives.getPrimitiveAndBoxTypes(Primitives.java:30) at org.javers.core.metamodel.type.TypeMapper.registerCoreTypes(TypeMapper.java:54) at org.javers.core.metamodel.type.TypeMapper.<init>(TypeMapper.java:40) ... 69 more

[shirishpandharikar]

@PodusovMaxim What version are you using? I looked inside the org.javers.common.collections.Primitives class. I do not see any reference to com/google/common/collect/Streams class. getPrimitiveAndBoxTypes methods just returns a statically defined array of classes.

[PodusovMaxim]

I'm using javers-3.11.0

link with com.google.common.collect.Streams

You need to change import from com.google.common.collect.Streams to java.util.stream.Stream

[shirishpandharikar]

@PodusovMaxim Thanks for reporting this. This is something that got added after #692 was reported and fixed. Will submit a PR.

[bartoszwalacik]

finally fixed in javers-3.11.1