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https://issues.apache.org/jira/browse/JAMES-2343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16461853#comment-16461853
]
ASF GitHub Bot commented on JAMES-2343:
---------------------------------------
Github user chibenwa commented on a diff in the pull request:
https://github.com/apache/james-project/pull/105#discussion_r185686252
--- Diff:
server/container/core/src/main/java/org/apache/james/server/core/BufferedDeferredFileOutputStream.java
---
@@ -0,0 +1,251 @@
+/*
+ * 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.james.server.core;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.io.output.ByteArrayOutputStream;
+import org.apache.commons.io.output.DeferredFileOutputStream;
+import org.apache.commons.io.output.ThresholdingOutputStream;
+
+/**
+ * An almost copy of {@link DeferredFileOutputStream} with buffered file
stream.
+ */
+public class BufferedDeferredFileOutputStream extends
ThresholdingOutputStream {
+
+ /**
+ * The output stream to which data will be written prior to the
theshold
+ * being reached.
+ */
+ private ByteArrayOutputStream memoryOutputStream;
+
+
+ /**
+ * The output stream to which data will be written at any given time.
This
+ * will always be one of <code>memoryOutputStream</code> or
+ * <code>diskOutputStream</code>.
+ */
+ private OutputStream currentOutputStream;
+
+
+ /**
+ * The file to which output will be directed if the threshold is
exceeded.
+ */
+ private File outputFile;
+
+ /**
+ * The temporary file prefix.
+ */
+ private final String prefix;
+
+ /**
+ * The temporary file suffix.
+ */
+ private final String suffix;
+
+ /**
+ * The directory to use for temporary files.
+ */
+ private final File directory;
+
+
+ /**
+ * True when close() has been called successfully.
+ */
+ private boolean closed = false;
+
+ /**
+ * Constructs an instance of this class which will trigger an event at
the
+ * specified threshold, and save data to a file beyond that point.
+ *
+ * @param threshold The number of bytes at which to trigger an event.
+ * @param outputFile The file to which data is saved beyond the
threshold.
+ */
+ public BufferedDeferredFileOutputStream(final int threshold, final
File outputFile) {
+ this(threshold, outputFile, null, null, null);
+ }
+
+
+ /**
+ * Constructs an instance of this class which will trigger an event at
the
+ * specified threshold, and save data to a temporary file beyond that
point.
+ *
+ * @param threshold The number of bytes at which to trigger an event.
+ * @param prefix Prefix to use for the temporary file.
+ * @param suffix Suffix to use for the temporary file.
+ * @param directory Temporary file directory.
+ *
+ * @since 1.4
--- End diff --
This `@since` and all followings makes no sens in a James context. They
should be removed.
> Use buffered file output stream for MimeMessageInputStreamSource
> ----------------------------------------------------------------
>
> Key: JAMES-2343
> URL: https://issues.apache.org/jira/browse/JAMES-2343
> Project: James Server
> Issue Type: Improvement
> Components: James Core
> Reporter: TzeKai Lee
> Priority: Major
>
> Currently MimeMessageInputStreamSource use DeferredFileOutputStream from
> commons-io which does _not_ buffer output stream when switched to
> FileOutputStream. In my preliminary test, simply wrap FileOutputStream with
> BufferedOutputStream could make a 50% performance improvement for mail larger
> than deferring threshold (currently 100kb).
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