- remove spring utils (make it provided)

- change the method compute on the more productivity computeIfAbsent
- a little style fixes in tests

.travis.yml

@@ -3,7 +3,7 @@ jdk:
  - oraclejdk8
 
 script:
- - mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent package sonar:sonar -Dsonar.exclusions="src/main/java/com/antkorwin/xsync/springframework/util/*" -Dsonar.issue.ignore.multicriteria="e1" -Dsonar.issue.ignore.multicriteria.e1.ruleKey="squid:S00119" -Dsonar.issue.ignore.multicriteria.e1.resourceKey="**/*.java"
+ - mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent package sonar:sonar -Dsonar.issue.ignore.multicriteria="e1" -Dsonar.issue.ignore.multicriteria.e1.ruleKey="squid:S00119" -Dsonar.issue.ignore.multicriteria.e1.resourceKey="**/*.java"
 
 addons:
   sonarcloud:

pom.xml

@@ -52,6 +52,12 @@
 			<version>3.1.0</version>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-core</artifactId>
+			<version>5.0.7.RELEASE</version>
+			<scope>provided</scope>
+		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>

src/main/java/com/antkorwin/xsync/XMutex.java

@@ -12,7 +12,7 @@
 @Getter
 public class XMutex<KeyT> {
 
-    private KeyT key;
+    private final KeyT key;
 
     public XMutex(KeyT key) {
         this.key = key;

src/main/java/com/antkorwin/xsync/XMutexFactory.java

@@ -1,7 +1,9 @@
 package com.antkorwin.xsync;
 
 
-import com.antkorwin.xsync.springframework.util.ConcurrentReferenceHashMap;
+
+
+import org.springframework.util.ConcurrentReferenceHashMap;
 
 import java.util.concurrent.ConcurrentMap;
 
@@ -51,7 +53,8 @@ public XMutexFactory(int concurrencyLevel,
      * then returns the same reference of the mutex.
      */
     public XMutex<KeyT> getMutex(KeyT key) {
-        return this.map.compute(key, (k, v) -> (v == null) ? new XMutex<>(k) : v);
+        //return this.map.compute(key, (k, v) -> (v == null) ? new XMutex<>(k) : v);
+        return this.map.computeIfAbsent(key, XMutex::new);
     }
 
     /**