Build feign with java 11 (#707)

* Enable build with java 11
* Added JDK 11 entry to CHANGELOG

.mvn/wrapper/maven-wrapper.properties

@@ -1 +1 @@
-distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.5.0/apache-maven-3.5.0-bin.zip
+distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.5.4/apache-maven-3.5.4-bin.zip

.travis.yml

@@ -3,17 +3,8 @@
 # https://docs.travis-ci.com/user/ci-environment/#Virtualization-environments
 sudo: required
 dist: trusty
-
-cache:
-  directories:
-  - $HOME/.m2
-
+sudo: false
 language: java
-
-jdk:
-  - oraclejdk8
-
-
 before_install:
   # Parameters used during release
   - git config user.name "$GH_USER"
@@ -29,6 +20,21 @@ install:
 script:
   - ./travis/publish.sh
 
+cache:
+  directories:
+  - $HOME/.m2
+
+matrix:
+  include:
+    - os: linux
+      jdk: oraclejdk8
+      addons:
+        apt:
+          packages:
+            - oracle-java8-installer
+    - os: linux
+      jdk: openjdk11
+
 # Don't build release tags. This avoids publish conflicts because the version commit exists both on master and the release tag.
 # See https://github.com/travis-ci/travis-ci/issues/1532
 branches:

CHANGELOG.md

@@ -1,7 +1,8 @@
 ### Version 10.0
 * Feign baseline is now JDK 8
-* Removed @Deprecated methods marked for removal on feign 10
-* `RetryException` includes the `Method` used for the offending `Request`
+  - Feign is now being built and tested with OpenJDK 11 as well. Releases and code base will use JDK 8, we are just testing compatibility with JDK 11.
+* Removed @Deprecated methods marked for removal on feign 10.
+* `RetryException` includes the `Method` used for the offending `Request`.
 * `Response` objects now contain the `Request` used.
 
 ### Version 9.6

jackson-jaxb/pom.xml

@@ -69,4 +69,5 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
+
 </project>

jackson/src/main/java/feign/jackson/JacksonIteratorDecoder.java

@@ -15,7 +15,11 @@ package feign.jackson;
 
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.JsonToken;
-import com.fasterxml.jackson.databind.*;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.Module;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectReader;
+import com.fasterxml.jackson.databind.RuntimeJsonMappingException;
 import feign.Response;
 import feign.Util;
 import feign.codec.DecodeException;

jaxb/pom.xml

@@ -43,4 +43,25 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
+
+  <profiles>
+    <profile>
+      <activation>
+        <jdk>11</jdk>
+      </activation>
+
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-surefire-plugin</artifactId>
+            <configuration>
+              <argLine>--add-modules java.xml.bind</argLine>
+            </configuration>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
+
 </project>

pom.xml

@@ -27,9 +27,7 @@
     <module>gson</module>
     <module>httpclient</module>
     <module>hystrix</module>
-    <module>jackson-jaxb</module>
     <module>jackson</module>
-    <module>jaxb</module>
     <module>jaxrs</module>
     <module>jaxrs2</module>
     <module>okhttp</module>
@@ -60,20 +58,20 @@
     <gson.version>2.5</gson.version>
 
     <junit.version>4.12</junit.version>
-    <!-- last version supporting JDK 7 -->
-    <assertj.version>1.7.1</assertj.version>
-    <jackson.version>2.6.4</jackson.version>
+    <jackson.version>2.9.6</jackson.version>
+    <assertj.version>3.10.0</assertj.version>
 
     <animal-sniffer-maven-plugin.version>1.15</animal-sniffer-maven-plugin.version>
-    <maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
+    <maven-compiler-plugin.version>3.8.0</maven-compiler-plugin.version>
     <maven-install-plugin.version>2.5.2</maven-install-plugin.version>
-    <maven-source-plugin.version>3.0.0</maven-source-plugin.version>
-    <maven-javadoc-plugin.version>2.10.3</maven-javadoc-plugin.version>
+    <maven-source-plugin.version>3.0.1</maven-source-plugin.version>
+    <maven-javadoc-plugin.version>3.0.1</maven-javadoc-plugin.version>
     <license-maven-plugin.version>3.0</license-maven-plugin.version>
-    <maven-jar-plugin.version>2.6</maven-jar-plugin.version>
+    <maven-jar-plugin.version>3.1.0</maven-jar-plugin.version>
     <maven-release-plugin.version>2.5.3</maven-release-plugin.version>
     <maven-bundle-plugin.version>3.2.0</maven-bundle-plugin.version>
     <centralsync-maven-plugin.version>0.1.0</centralsync-maven-plugin.version>
+    <maven-surefire-plugin.version>2.22.0</maven-surefire-plugin.version>
   </properties>
 
   <name>Feign (Parent)</name>
@@ -310,7 +308,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-surefire-plugin</artifactId>
-          <version>2.20</version>
+          <version>${maven-surefire-plugin.version}</version>
           <configuration>
             <redirectTestOutputToFile>true</redirectTestOutputToFile>
           </configuration>
@@ -464,6 +462,16 @@
   </build>
 
   <profiles>
+    <profile>
+      <activation>
+        <jdk>1.8</jdk>
+      </activation>
+
+      <modules>
+        <module>jackson-jaxb</module>
+        <module>jaxb</module>
+      </modules>
+    </profile>
     <profile>
       <id>release</id>
       <build>