Make acquirePermit a default method on CircuitBreaker

Author: jhalterman

src/main/java/dev/failsafe/CircuitBreaker.java

@@ -110,7 +110,10 @@ enum State {
    * @see #recordSuccess()
    * @see #recordFailure()
    */
-  void acquirePermit();
+  default void acquirePermit() {
+    if (!tryAcquirePermit())
+      throw new CircuitBreakerOpenException(this);
+  }
 
   /**
    * Attempts to acquire a permit to use the circuit breaker and returns whether a permit was acquired. Permission will

src/main/java/dev/failsafe/internal/CircuitBreakerImpl.java

@@ -54,11 +54,6 @@ public boolean tryAcquirePermit() {
     return state.get().tryAcquirePermit();
   }
 
-  @Override
-  public void acquirePermit() {
-    state.get().acquirePermit();
-  }
-
   @Override
   public void close() {
     transitionTo(State.CLOSED, config.getCloseListener(), null);

src/main/java/dev/failsafe/internal/CircuitState.java

@@ -67,11 +67,6 @@ public void handleConfigChange() {
   void checkThreshold(ExecutionContext<R> context) {
   }
 
-  void acquirePermit() {
-    if (!tryAcquirePermit())
-      throw new CircuitBreakerOpenException(breaker);
-  }
-
   abstract boolean tryAcquirePermit();
 
   void releasePermit() {