Reload key & trust stores on reconfiguration

log4j-core-test/src/main/java/org/apache/logging/log4j/core/test/ListErrorHandler.java → log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/BufferingErrorHandler.java

@@ -14,59 +14,55 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.logging.log4j.core.test;
+package org.apache.logging.log4j.core.appender;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
-import java.util.stream.Stream;
 import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.core.ErrorHandler;
 import org.apache.logging.log4j.core.LogEvent;
 import org.apache.logging.log4j.message.SimpleMessage;
 import org.apache.logging.log4j.status.StatusData;
 import org.apache.logging.log4j.util.StackLocatorUtil;
 
-public class ListErrorHandler implements ErrorHandler {
+/**
+ * {@link ErrorHandler} implementation buffering invocations in the form of {@link StatusData}.
+ */
+final class BufferingErrorHandler implements ErrorHandler {
+
+    private final List<StatusData> statusDataBuffer = Collections.synchronizedList(new ArrayList<>());
 
-    private final ArrayList<StatusData> statusData = new ArrayList<>();
+    BufferingErrorHandler() {}
 
-    private void addStatusData(final String msg, final Throwable t) {
-        synchronized (statusData) {
-            final StackTraceElement caller = StackLocatorUtil.getStackTraceElement(3);
-            final String threadName = Thread.currentThread().getName();
-            statusData.add(new StatusData(caller, Level.ERROR, new SimpleMessage(msg), t, threadName));
-        }
+    private void addStatusData(final String message, final Throwable throwable) {
+        final StackTraceElement caller = StackLocatorUtil.getStackTraceElement(3);
+        final String threadName = Thread.currentThread().getName();
+        final StatusData statusData =
+                new StatusData(caller, Level.ERROR, new SimpleMessage(message), throwable, threadName);
+        statusDataBuffer.add(statusData);
     }
 
     @Override
-    public void error(String msg) {
-        addStatusData(msg, null);
+    public void error(String message) {
+        addStatusData(message, null);
     }
 
     @Override
-    public void error(String msg, Throwable t) {
-        addStatusData(msg, t);
+    public void error(final String message, final Throwable throwable) {
+        addStatusData(message, throwable);
     }
 
     @Override
-    public void error(String msg, LogEvent event, Throwable t) {
-        addStatusData(msg, t);
+    public void error(final String message, final LogEvent event, final Throwable throwable) {
+        addStatusData(message, throwable);
     }
 
     public void clear() {
-        synchronized (statusData) {
-            statusData.clear();
-        }
-    }
-
-    public Stream<StatusData> getStatusData() {
-        synchronized (statusData) {
-            return ((List<StatusData>) statusData.clone()).stream();
-        }
+        statusDataBuffer.clear();
     }
 
-    public Stream<StatusData> findStatusData(String regex) {
-        return getStatusData()
-                .filter(data -> data.getMessage().getFormattedMessage().matches(regex));
+    public List<StatusData> getBuffer() {
+        return statusDataBuffer;
     }
 }

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/FixedHostResolver.java

@@ -0,0 +1,47 @@
+/*
+ * 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.logging.log4j.core.appender;
+
+import java.net.InetSocketAddress;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+import org.apache.logging.log4j.core.net.TcpSocketManager;
+
+/**
+ * {@link TcpSocketManager.HostResolver} implementation always resolving to the given list of {@link #addresses}.
+ */
+final class FixedHostResolver extends TcpSocketManager.HostResolver {
+
+    private final List<InetSocketAddress> addresses;
+
+    private FixedHostResolver(final List<InetSocketAddress> addresses) {
+        this.addresses = addresses;
+    }
+
+    static FixedHostResolver ofServers(final LineReadingTcpServer... servers) {
+        final List<InetSocketAddress> addresses = Arrays.stream(servers)
+                .map(server -> (InetSocketAddress) server.getServerSocket().getLocalSocketAddress())
+                .collect(Collectors.toList());
+        return new FixedHostResolver(addresses);
+    }
+
+    @Override
+    public List<InetSocketAddress> resolveHost(final String ignoredHost, final int ignoredPort) {
+        return addresses;
+    }
+}