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jamesbognar pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/juneau.git
The following commit(s) were added to refs/heads/master by this push:
new 182dcdb Add byte buffer reuse to IOUtils.
182dcdb is described below
commit 182dcdbc0799797c9a66697b4708832e18c80730
Author: JamesBognar <[email protected]>
AuthorDate: Mon Mar 8 13:53:29 2021 -0500
Add byte buffer reuse to IOUtils.
---
.../apache/juneau/internal/FileWriterBuilder.java | 17 ++++-
.../java/org/apache/juneau/internal/IOUtils.java | 88 ++++++++++++----------
2 files changed, 64 insertions(+), 41 deletions(-)
diff --git
a/juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/FileWriterBuilder.java
b/juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/FileWriterBuilder.java
index 1e63f8f..0c3e5af 100644
---
a/juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/FileWriterBuilder.java
+++
b/juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/FileWriterBuilder.java
@@ -22,7 +22,7 @@ public final class FileWriterBuilder {
private File file;
private Charset cs = Charset.defaultCharset();
- private boolean append;
+ private boolean append, buffered;
/**
* Creates a new builder.
@@ -112,12 +112,25 @@ public final class FileWriterBuilder {
}
/**
+ * Sets the buffer mode on the writer to <jk>true</jk>.
+ *
+ * @return This object (for method chaining).
+ */
+ public FileWriterBuilder buffered() {
+ this.buffered = true;
+ return this;
+ }
+
+ /**
* Creates a new File writer.
*
* @return A new File writer.
* @throws FileNotFoundException If file could not be found.
*/
public Writer build() throws FileNotFoundException {
- return new OutputStreamWriter(new FileOutputStream(file,
append), cs);
+ OutputStream os = new FileOutputStream(file, append);
+ if (buffered)
+ os = new BufferedOutputStream(os);
+ return new OutputStreamWriter(os, cs);
}
}
diff --git
a/juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/IOUtils.java
b/juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/IOUtils.java
index 11760d0..c95ac5f 100644
---
a/juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/IOUtils.java
+++
b/juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/IOUtils.java
@@ -15,6 +15,7 @@ package org.apache.juneau.internal;
import java.io.*;
import java.nio.charset.*;
import java.util.*;
+import java.util.concurrent.atomic.*;
/**
* Various I/O related utility methods.
@@ -32,6 +33,20 @@ public final class IOUtils {
}
};
+ private static final ThreadLocal<byte[]> BYTE_BUFFER_CACHE =
(Boolean.getBoolean("juneau.disableIoBufferReuse") ? null : new
ThreadLocal<>());
+ private static final ThreadLocal<char[]> CHAR_BUFFER_CACHE =
(Boolean.getBoolean("juneau.disableIoBufferReuse") ? null : new
ThreadLocal<>());
+
+ static final AtomicInteger cacheHits = new AtomicInteger();
+
+ static {
+ Runtime.getRuntime().addShutdownHook(new Thread() {
+ @Override
+ public void run() {
+ System.out.println("I/O buffer cache hits: " +
cacheHits.get());
+ }
+ });
+ }
+
/** Reusable empty reader. */
public static final Reader EMPTY_READER = new Reader() {
@Override
@@ -69,7 +84,7 @@ public final class IOUtils {
public static long pipe(Reader in, File out) throws IOException {
if (out == null || in == null)
return 0;
- try (Writer w = FileWriterBuilder.create(out).build()) {
+ try (Writer w =
FileWriterBuilder.create(out).buffered().build()) {
return pipe(in, w);
}
}
@@ -94,7 +109,7 @@ public final class IOUtils {
return 0;
long total = 0;
try (Reader in2 = in) {
- char[] buffer = new char[buffSize(-1)];
+ char[] buffer = charBuffer(-1);
int readLen;
while ((readLen = in.read(buffer)) != -1) {
out.write(buffer, 0, readLen);
@@ -209,7 +224,7 @@ public final class IOUtils {
public static long pipe(InputStream in, OutputStream out, long
maxBytes) throws IOException {
if (in == null || out == null)
return 0;
- byte[] buffer = new byte[buffSize(maxBytes)];
+ byte[] buffer = byteBuffer((int)maxBytes);
int readLen;
long total = 0;
if (maxBytes < 0) {
@@ -253,7 +268,7 @@ public final class IOUtils {
try (Reader in2 = in) {
OutputStreamWriter osw = new OutputStreamWriter(out,
UTF8);
int i;
- char[] b = new char[BUFF_SIZE];
+ char[] b = charBuffer(-1);
while ((i = in.read(b)) > 0) {
total += i;
osw.write(b, 0, i);
@@ -373,7 +388,7 @@ public final class IOUtils {
return null;
try (Reader in2 = in) {
StringBuilder sb = new
StringBuilder(buffSize(expectedLength)); // Assume they're ASCII characters.
- char[] buf = new char[buffSize(expectedLength)];
+ char[] buf = charBuffer((int)expectedLength);
int i = 0;
while ((i = in2.read(buf)) != -1)
sb.append(buf, 0, i);
@@ -421,39 +436,6 @@ public final class IOUtils {
}
/**
- * Shortcut for calling <c>readBytes(in, 1024);</c>
- *
- * @param in
- * The object to read into a byte array.
- * <br>Can be any of the following types:
- * <ul>
- * <li><code><jk>byte</jk>[]</code>
- * <li>{@link InputStream}
- * <li>{@link Reader}
- * <li>{@link CharSequence}
- * <li>{@link File}
- * </ul>
- * @return The contents of the stream as a byte array.
- * @throws IOException Thrown by underlying stream or if object is not
a supported type.
- */
- @Deprecated
- public static byte[] readBytes(Object in) throws IOException {
- if (in == null)
- return new byte[0];
- if (in instanceof byte[])
- return (byte[])in;
- if (in instanceof CharSequence)
- return in.toString().getBytes(UTF8);
- if (in instanceof InputStream)
- return readBytes((InputStream)in);
- if (in instanceof Reader)
- return read((Reader)in, 0).getBytes(UTF8);
- if (in instanceof File)
- return readBytes((File)in);
- throw new IOException("Cannot convert object of type
'"+in.getClass().getName()+"' to a byte array.");
- }
-
- /**
* Reads the specified input stream into the specified byte array.
*
* @param in
@@ -486,7 +468,7 @@ public final class IOUtils {
return new byte[0];
ByteArrayOutputStream buff = new
ByteArrayOutputStream(buffSize(maxBytes));
int nRead;
- byte[] b = new byte[buffSize(maxBytes)];
+ byte[] b = byteBuffer(maxBytes);
while ((nRead = in.read(b, 0, b.length)) != -1)
buff.write(b, 0, nRead);
buff.flush();
@@ -765,6 +747,34 @@ public final class IOUtils {
return null;
}
+ private static final byte[] byteBuffer(int maxBytes) {
+ if (BYTE_BUFFER_CACHE != null) {
+ byte[] x = BYTE_BUFFER_CACHE.get();
+ if (x == null) {
+ x = new byte[BUFF_SIZE];
+ BYTE_BUFFER_CACHE.set(x);
+ } else {
+ cacheHits.incrementAndGet();
+ }
+ return x;
+ }
+ return new byte[buffSize(maxBytes)];
+ }
+
+ private static final char[] charBuffer(int maxChars) {
+ if (CHAR_BUFFER_CACHE != null) {
+ char[] x = CHAR_BUFFER_CACHE.get();
+ if (x == null) {
+ x = new char[BUFF_SIZE];
+ CHAR_BUFFER_CACHE.set(x);
+ } else {
+ cacheHits.incrementAndGet();
+ }
+ return x;
+ }
+ return new char[buffSize(maxChars)];
+ }
+
private static final int buffSize(long max) {
return (max > 0 && max < BUFF_SIZE) ? (int)max : BUFF_SIZE;
}
