Replace Guava with Caffeine in Spring jar

Signed-off-by: Dave Syer <dsyer@vmware.com>

Author: Dave Syer

spring/pom.xml

@@ -39,6 +39,10 @@
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-actuator</artifactId>
     </dependency>
+    <dependency>
+      <groupId>com.github.ben-manes.caffeine</groupId>
+      <artifactId>caffeine</artifactId>
+    </dependency>
 
     <dependency>
       <groupId>junit</groupId>

spring/src/main/java/io/kubernetes/client/spring/extended/network/endpoints/PollingEndpointsGetter.java

@@ -12,34 +12,35 @@
 */
 package io.kubernetes.client.spring.extended.network.endpoints;
 
-import com.google.common.cache.Cache;
-import com.google.common.cache.CacheBuilder;
 import io.kubernetes.client.apimachinery.NamespaceName;
 import io.kubernetes.client.openapi.ApiClient;
+import io.kubernetes.client.openapi.ApiException;
 import io.kubernetes.client.openapi.apis.CoreV1Api;
 import io.kubernetes.client.openapi.models.V1Endpoints;
 import java.time.Duration;
-import java.util.concurrent.ExecutionException;
+
+import com.github.benmanes.caffeine.cache.Cache;
+import com.github.benmanes.caffeine.cache.Caffeine;
+
 import org.springframework.beans.factory.annotation.Autowired;
 
 public class PollingEndpointsGetter implements EndpointsGetter {
 
-  private static final Cache<NamespaceName, V1Endpoints> lastObservedEndpoints =
-      CacheBuilder.newBuilder().expireAfterWrite(Duration.ofMinutes(5)).build();
+  private static final Cache<NamespaceName, V1Endpoints> lastObservedEndpoints = Caffeine.newBuilder()
+      .expireAfterWrite(Duration.ofMinutes(5)).build();
 
-  @Autowired private ApiClient apiClient;
+  @Autowired
+  private ApiClient apiClient;
 
   @Override
   public V1Endpoints get(String namespace, String name) {
     CoreV1Api coreV1Api = new CoreV1Api(apiClient);
-    try {
-      return lastObservedEndpoints.get(
-          new NamespaceName(namespace, name),
-          () -> {
-            return coreV1Api.readNamespacedEndpoints(name, namespace, null, null, null);
-          });
-    } catch (ExecutionException e) {
-      throw new RuntimeException(e);
-    }
+    return lastObservedEndpoints.get(new NamespaceName(namespace, name), k -> {
+      try {
+        return coreV1Api.readNamespacedEndpoints(name, namespace, null, null, null);
+      } catch (ApiException e) {
+        throw new IllegalStateException(e);
+      }
+    });
   }
 }