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Talk notes - Microservices

• Sam Newman - Building Microservices, Book @ O’Reilly

• Otto Developer Blog - Architektur

• Stefan Tilkov - Breaking the monolith — Towards a system-of-systems architecture, Video recording

• Self-contained systems and ROCA - Blog entry

• Sam Newman - Microservices for greenfield? — http://samnewman.io/blog/2015/04/07/microservices-for-greenfield

• Spring Boot - Project website

• Spring Cloud - Project website

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Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.443 sec <<< FAILURE!
supportForExpressionBasedQueryMethods(org.springframework.data.jpa.repository.MappedTypeRepositoryIntegrationTests)  Time elapsed: 0 sec  <<< ERROR!
java.lang.IllegalStateException: Failed to load ApplicationContext
	at org.springframework.test.context.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:94)
	at org.springframework.test.context.DefaultTestContext.getApplicationContext(DefaultTestContext.java:72)
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:117)
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83)
	at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:212)
	at org.springframework.test.context.junit4.SpringJUnit4ClassR

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{
  "_embedded" : {
    "orders" : [ {
      "items" : [ {
        "description" : "Lakewood guitar",
        "price" : 1299.00
      } ],
      "_embedded" : {
        "customer" : {
          "address" : "4711 Some Place, 54321 Charlottesville, VA",

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The GA release of Spring Data release train Fowler marks the finishing line of 6 month of development. It's time to give you an impression of the content of this release and a brief overview about individual features. The major themes of the Fowler release train were performance improvements and enhanced Java 8 support that are mainly reflected in the Spring Data JPA and MongoDB modules but a lot of other ones have seen significant improvements, too.

The easiest way to upgrade to the Spring Data Fowler release train is by using Spring Boot and configuring the spring-data-releasetrain.version property to Fowler-RELEASE. If you're not using Spring Boot yet, add the Spring Data BOM to your <dependencyManagement /> section of your Maven POM.

General themes

Java 8 streams in repository methods

One of Java 8's great new features is the Stream API, which allows Java developers t

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Keybase proof

I hereby claim:

• I am olivergierke on github.
• I am olivergierke (https://keybase.io/olivergierke) on keybase.
• I have a public key whose fingerprint is 039A 44B8 6EA1 60D8 C5A7 7234 289F 3090 4F34 EB27

To claim this, I am signing this object:

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package foo;

@NoRepositoryBean
interface InternalRepository<T> extends Repository<T, Long> {

  <S extends T> save(S entity);
}

package foo;

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{
  "version" : "1.0",
  "descriptors" : [ {
    "id" : "order-representation",
    "descriptors" : [ {
      "name" : "status",
      "doc" : {
        "value" : "PAYMENT_EXPECTED, PAID, PREPARING, READY, TAKEN",
        "format" : "TEXT"
      },

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List<Object> nested = new ArrayList<Object>();
nested.addAll(someNesteditems);
nested.addAll(someOtherNestedItems);

SampleResource resource = new SampleResource();
resource.nested = new Resources<Object>(nested);

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[INFO] --- maven-surefire-plugin:2.12:test (datanucleus-tests) @ spring-data-jpa ---
[INFO] Surefire report directory: /Users/olivergierke/Documents/workspace/spring-data-jpa/target/surefire-reports

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
objc[70822]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/jre/bin/java and /Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.
Running org.springframework.data.jpa.repository.DataNucleusNamespaceUserRepositoryTests
2014-03-13 10:09:51,497 ERROR ramework.test.context.TestContextManager: 309 - Caught exception while allowing TestExecutionListener [org.springframework.test.context.support.DependencyInjectionTestExecutionListener@5f36ba3] to prepare test instance [org.springframework.data.jpa.repository.DataNucleusNamespaceUserRepositoryTes

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mongoOps.execute("myCollection", new CollectionCallback<Void> {
	public Void doInCollection(DBCollection collection) {
	  collection.rename("myNewCollection");
	}
}