HTTPCLIENT-1928: FutureCallback implementation that catches and logs exceptions thrown in #completed method

httpclient5/src/main/java/org/apache/hc/client5/http/async/methods/IgnoreCompleteExceptonFutureCallback.java

@@ -0,0 +1,69 @@
+/*
+ * ====================================================================
+ * 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+package org.apache.hc.client5.http.async.methods;
+
+import org.apache.hc.core5.concurrent.FutureCallback;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class IgnoreCompleteExceptonFutureCallback<T> implements FutureCallback<T> {
+
+    private final FutureCallback<T> callback;
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    public IgnoreCompleteExceptonFutureCallback(final FutureCallback<T> callback) {
+        super();
+        this.callback = callback;
+    }
+
+    @Override
+    public void completed(final T result) {
+        if (callback != null) {
+            try {
+                callback.completed(result);
+            } catch (final Exception ex) {
+                log.error(ex.getMessage(), ex);
+            }
+        }
+    }
+
+    @Override
+    public void failed(final Exception ex) {
+        if (callback != null) {
+            callback.failed(ex);
+        }
+    }
+
+    @Override
+    public void cancelled() {
+        if (callback != null) {
+            callback.cancelled();
+        }
+    }
+
+}