Added BT node for acquiring locks

Author: Bytekeeper

src/main/java/org/bk/ass/bt/AcquireLock.java

@@ -0,0 +1,27 @@
+package org.bk.ass.bt;
+
+import org.bk.ass.manage.Lock;
+
+public class AcquireLock<T> extends TreeNode {
+
+  private final Lock<T> lock;
+
+  public AcquireLock(Lock<T> lock) {
+    this.lock = lock;
+  }
+
+  @Override
+  public void exec() {
+    if (lock.acquire()) {
+      success();
+    } else {
+      failed();
+    }
+  }
+
+  @Override
+  public void reset() {
+    super.reset();
+    lock.reset();
+  }
+}