Server增加setThreads方法，可以动态修改线程池的大小

src/org/redkale/net/Context.java

@@ -31,7 +31,7 @@ public class Context {
     protected final long serverStartTime;
 
     //Server的线程池
-    protected final ExecutorService executor;
+    protected final ThreadPoolExecutor executor;
 
     //ByteBuffer的容量，默认8K
     protected final int bufferCapacity;
@@ -69,7 +69,7 @@ public class Context {
     //JSON操作工厂
     protected final JsonFactory jsonFactory;
 
-    public Context(long serverStartTime, Logger logger, ExecutorService executor, int bufferCapacity, ObjectPool<ByteBuffer> bufferPool, ObjectPool<Response> responsePool,
+    public Context(long serverStartTime, Logger logger, ThreadPoolExecutor executor, int bufferCapacity, ObjectPool<ByteBuffer> bufferPool, ObjectPool<Response> responsePool,
         final int maxbody, Charset charset, InetSocketAddress address, final PrepareServlet prepare, final int readTimeoutSecond, final int writeTimeoutSecond) {
         this.serverStartTime = serverStartTime;
         this.logger = logger;

src/org/redkale/net/Server.java

@@ -71,7 +71,7 @@ public abstract class Server<K extends Serializable, C extends Context, R extend
     protected int threads;
 
     //线程池
-    protected ExecutorService executor;
+    protected ThreadPoolExecutor executor;
 
     //ByteBuffer池大小
     protected int bufferPoolSize;
@@ -113,7 +113,7 @@ public abstract class Server<K extends Serializable, C extends Context, R extend
         final AtomicInteger counter = new AtomicInteger();
         final Format f = createFormat();
         final String n = name;
-        this.executor = Executors.newFixedThreadPool(threads, (Runnable r) -> {
+        this.executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(threads, (Runnable r) -> {
             Thread t = new WorkThread(executor, r);
             t.setName(n + "-ServletThread-" + f.format(counter.incrementAndGet()));
             return t;
@@ -166,6 +166,13 @@ public abstract class Server<K extends Serializable, C extends Context, R extend
         return this.context;
     }
 
+    public void setThreads(int threads) {
+        int oldthreads = this.threads;
+        this.context.executor.setCorePoolSize(threads);
+        this.threads = threads;
+        logger.info("[" + Thread.currentThread().getName() + "] " + this.getClass().getSimpleName() + " change threads from " + oldthreads + " to " + threads);
+    }
+
     @SuppressWarnings("unchecked")
     public void addServlet(S servlet, final Object attachment, AnyValue conf, K... mappings) {
         this.prepare.addServlet(servlet, attachment, conf, mappings);

src/org/redkale/net/http/HttpContext.java

@@ -30,7 +30,7 @@ public class HttpContext extends Context {
 
     protected final ConcurrentHashMap<Class, Creator> asyncHandlerCreators = new ConcurrentHashMap<>();
 
-    public HttpContext(long serverStartTime, Logger logger, ExecutorService executor, int bufferCapacity, ObjectPool<ByteBuffer> bufferPool,
+    public HttpContext(long serverStartTime, Logger logger, ThreadPoolExecutor executor, int bufferCapacity, ObjectPool<ByteBuffer> bufferPool,
         ObjectPool<Response> responsePool, int maxbody, Charset charset, InetSocketAddress address, PrepareServlet prepare,
         int readTimeoutSecond, int writeTimeoutSecond) {
         super(serverStartTime, logger, executor, bufferCapacity, bufferPool, responsePool, maxbody, charset,

src/org/redkale/net/sncp/SncpContext.java

@@ -8,7 +8,7 @@ package org.redkale.net.sncp;
 import java.net.InetSocketAddress;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
-import java.util.concurrent.ExecutorService;
+import java.util.concurrent.ThreadPoolExecutor;
 import java.util.logging.Logger;
 import org.redkale.net.*;
 import org.redkale.util.ObjectPool;
@@ -21,7 +21,7 @@ import org.redkale.util.ObjectPool;
  */
 public class SncpContext extends Context {
 
-    public SncpContext(long serverStartTime, Logger logger, ExecutorService executor, int bufferCapacity, ObjectPool<ByteBuffer> bufferPool,
+    public SncpContext(long serverStartTime, Logger logger, ThreadPoolExecutor executor, int bufferCapacity, ObjectPool<ByteBuffer> bufferPool,
         ObjectPool<Response> responsePool, int maxbody, Charset charset, InetSocketAddress address, PrepareServlet prepare,
         int readTimeoutSecond, int writeTimeoutSecond) {
         super(serverStartTime, logger, executor, bufferCapacity, bufferPool, responsePool, maxbody, charset,