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java/org/apache/tomcat/util/threads/ResizableExecutor.java

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+/*
+ * 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.tomcat.util.threads;
+
+import java.util.concurrent.Executor;
+
+public interface ResizableExecutor extends Executor {
+
+    /**
+     * Returns the current number of threads in the pool.
+     *
+     * @return the number of threads
+     */
+    public int getPoolSize();
+
+    public int getMaxThreads();
+
+    /**
+     * Returns the approximate number of threads that are actively executing
+     * tasks.
+     *
+     * @return the number of threads
+     */
+    public int getActiveCount();
+
+    public boolean resizePool(int corePoolSize, int maximumPoolSize);
+
+    public boolean resizeQueue(int capacity);
+
+}