Extract

artemis-server/src/main/java/org/apache/activemq/artemis/core/server/PriorityAware.java → artemis-commons/src/main/java/org/apache/activemq/artemis/core/PriorityAware.java

@@ -14,13 +14,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.activemq.artemis.core.server;
-
-import org.apache.activemq.artemis.api.config.ActiveMQDefaultConfiguration;
+package org.apache.activemq.artemis.core;
 
 public interface PriorityAware {
 
-   default int getPriority() {
-      return ActiveMQDefaultConfiguration.getDefaultConsumerPriority();
-   }
+   int getPriority();
 }

artemis-commons/src/main/java/org/apache/activemq/artemis/utils/collections/ArrayResettableIterator.java

@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.activemq.artemis.utils.collections;
+
+public class ArrayResettableIterator<T> implements ResettableIterator<T> {
+
+   private final Object[] array;
+   private int cursor = 0;
+   private int endPos = -1;
+   private boolean hasNext;
+
+   public ArrayResettableIterator(Object[] array) {
+      this.array = array;
+      reset();
+   }
+
+   @Override
+   public ResettableIterator<T> reset() {
+      endPos = cursor;
+      hasNext = array.length > 0;
+      return this;
+   }
+
+   @Override
+   public boolean hasNext() {
+      return hasNext;
+   }
+
+   @Override
+   public T next() {
+      if (!hasNext) {
+         throw new IllegalStateException();
+      }
+      @SuppressWarnings("unchecked") T result = (T) array[cursor];
+      cursor++;
+      if (cursor == array.length) {
+         cursor = 0;
+      }
+      if (cursor == endPos) {
+         hasNext = false;
+      }
+      return result;
+   }
+}

artemis-commons/src/main/java/org/apache/activemq/artemis/utils/collections/MultiIterator.java

@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.activemq.artemis.utils.collections;
+
+import java.util.Iterator;
+
+public class MultiIterator<T> implements Iterator<T> {
+
+   private final Iterator<T>[] iterators;
+   int index = -1;
+
+   public MultiIterator(Iterator<T>[] iterators) {
+      this.iterators = iterators;
+   }
+
+   @Override
+   public boolean hasNext() {
+      while (true) {
+         if (index != -1) {
+            Iterator<T> currentIterator = get(index);
+            if (currentIterator.hasNext()) {
+               return true;
+            }
+         }
+         int next = index + 1;
+         if (next < iterators.length) {
+            moveTo(next);
+         } else {
+            return false;
+         }
+      }
+   }
+
+   @Override
+   public T next() {
+      while (true) {
+         if (index != -1) {
+            Iterator<T> currentIterator = get(index);
+            if (currentIterator.hasNext()) {
+               return currentIterator.next();
+            }
+         }
+         int next = index + 1;
+         if (next < iterators.length) {
+            moveTo(next);
+         } else {
+            return null;
+         }
+      }
+   }
+
+   protected void moveTo(int index) {
+      this.index = index;
+   }
+
+   protected Iterator<T> get(int index) {
+      return iterators[index];
+   }
+}

artemis-commons/src/main/java/org/apache/activemq/artemis/utils/collections/MultiResettableIterator.java

@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.activemq.artemis.utils.collections;
+
+public class MultiResettableIterator<T> extends MultiIterator<T> implements ResettableIterator<T> {
+
+   public MultiResettableIterator(ResettableIterator<T>[] iterators) {
+      super(iterators);
+   }
+
+   @Override
+   protected void moveTo(int index) {
+      super.moveTo(index);
+      if (index > -1) {
+         ((ResettableIterator<T>) get(index)).reset();
+      }
+   }
+
+   @Override
+   public ResettableIterator<T> reset() {
+      moveTo(-1);
+      return this;
+   }
+}