Using Java7+ NIO API for improved performance: Modern JREs offload to…

… OS, and do other tricks.

core-common/src/main/java/org/glassfish/jersey/SslConfigurator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2019 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -17,10 +17,11 @@
 package org.glassfish.jersey;
 
 import java.io.ByteArrayInputStream;
-import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.security.AccessController;
 import java.security.KeyManagementException;
 import java.security.KeyStore;
@@ -635,7 +636,7 @@ public SSLContext createSSLContext() {
                     if (keyStoreBytes != null) {
                         keyStoreInputStream = new ByteArrayInputStream(keyStoreBytes);
                     } else if (!keyStoreFile.equals("NONE")) {
-                        keyStoreInputStream = new FileInputStream(keyStoreFile);
+                        keyStoreInputStream = Files.newInputStream(Paths.get(keyStoreFile));
                     }
                     _keyStore.load(keyStoreInputStream, keyStorePass);
                 } finally {
@@ -710,7 +711,7 @@ public SSLContext createSSLContext() {
                     if (trustStoreBytes != null) {
                         trustStoreInputStream = new ByteArrayInputStream(trustStoreBytes);
                     } else if (!trustStoreFile.equals("NONE")) {
-                        trustStoreInputStream = new FileInputStream(trustStoreFile);
+                        trustStoreInputStream = Files.newInputStream(Paths.get(trustStoreFile));
                     }
                     _trustStore.load(trustStoreInputStream, trustStorePass);
                 } finally {

core-common/src/main/java/org/glassfish/jersey/message/internal/AbstractMessageReaderWriterProvider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2019 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -24,6 +24,7 @@
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Type;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.ext.MessageBodyReader;
@@ -42,16 +43,22 @@ public abstract class AbstractMessageReaderWriterProvider<T> implements MessageB
 
     /**
      * The UTF-8 Charset.
+     *
+     * @deprecated use {@code StandardCharsets.UTF_8} instead.
      */
-    public static final Charset UTF8 = ReaderWriter.UTF8;
+    @Deprecated(forRemoval = true)
+    public static final Charset UTF8 = StandardCharsets.UTF_8;
 
     /**
      * Reader bytes from an input stream and write then to an output stream.
      *
      * @param in  the input stream to read from.
      * @param out the output stream to write to.
      * @throws IOException if there is an error reading or writing bytes.
+     *
+     * @deprecated use {@code ReaderWriter.writeTo(in, out)} instead.
      */
+    @Deprecated
     public static void writeTo(InputStream in, OutputStream out) throws IOException {
         ReaderWriter.writeTo(in, out);
     }
@@ -62,7 +69,10 @@ public static void writeTo(InputStream in, OutputStream out) throws IOException
      * @param in  the reader to read from.
      * @param out the writer to write to.
      * @throws IOException if there is an error reading or writing characters.
+     *
+     * @deprecated use {@code ReaderWriter.writeTo(in, out)} instead.
      */
+    @Deprecated
     public static void writeTo(Reader in, Writer out) throws IOException {
         ReaderWriter.writeTo(in, out);
     }

core-common/src/main/java/org/glassfish/jersey/message/internal/FileProvider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2019 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -16,16 +16,14 @@
 
 package org.glassfish.jersey.message.internal;
 
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
 import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Type;
+import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
 
 import javax.ws.rs.Consumes;
 import javax.ws.rs.Produces;
@@ -62,13 +60,8 @@ public File readFrom(final Class<File> type,
                          final MultivaluedMap<String, String> httpHeaders,
                          final InputStream entityStream) throws IOException {
         final File file = Utils.createTempFile();
-        final OutputStream stream = new BufferedOutputStream(new FileOutputStream(file));
 
-        try {
-            writeTo(entityStream, stream);
-        } finally {
-            stream.close();
-        }
+        Files.copy(entityStream, file.toPath(), StandardCopyOption.REPLACE_EXISTING);
 
         return file;
     }
@@ -89,13 +82,7 @@ public void writeTo(final File t,
                         final MediaType mediaType,
                         final MultivaluedMap<String, Object> httpHeaders,
                         final OutputStream entityStream) throws IOException {
-        final InputStream stream = new BufferedInputStream(new FileInputStream(t), ReaderWriter.BUFFER_SIZE);
-
-        try {
-            writeTo(stream, entityStream);
-        } finally {
-            stream.close();
-        }
+        Files.copy(t.toPath(), entityStream);
     }
 
     @Override

core-common/src/main/java/org/glassfish/jersey/message/internal/ReaderWriter.java

@@ -19,12 +19,12 @@
 import java.io.Closeable;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.Reader;
 import java.io.Writer;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.security.AccessController;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -54,8 +54,11 @@ public final class ReaderWriter {
     private static final Logger LOGGER = Logger.getLogger(ReaderWriter.class.getName());
     /**
      * The UTF-8 Charset.
+     *
+     * @deprecated use {@code StandardCharsets.UTF_8} instead
      */
-    public static final Charset UTF8 = Charset.forName("UTF-8");
+    @Deprecated(forRemoval = true)
+    public static final Charset UTF8 = StandardCharsets.UTF_8;
     /**
      * The buffer size for arrays of byte and character.
      */
@@ -167,7 +170,7 @@ public static String readFromAsString(Reader reader) throws IOException {
 
     /**
      * Java 9+ InputStream::readAllBytes
-     * TODO Replace when Java 8 not any longer supported (3.1+)
+     * TODO Replace in Jersey 4.0, as the sole difference to OpenJDK is working around a bug in the input stream.
      */
     private static byte[] readAllBytes(InputStream inputStream) throws IOException {
         List<byte[]> bufs = null;
@@ -242,9 +245,9 @@ private static byte[] readAllBytes(InputStream inputStream) throws IOException {
      * @throws IOException in case of a write failure.
      */
     public static void writeToAsString(String s, OutputStream out, MediaType type) throws IOException {
-        Writer osw = new OutputStreamWriter(out, getCharset(type));
-        osw.write(s, 0, s.length());
-        osw.flush();
+        try (final Writer osw = new OutputStreamWriter(out, getCharset(type))) {
+            osw.write(s);
+        }
     }
 
     /**

core-common/src/test/java/org/glassfish/jersey/message/internal/UtilsTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2022 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -22,22 +22,19 @@
 import java.io.BufferedOutputStream;
 import java.io.ByteArrayInputStream;
 import java.io.File;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
+import java.nio.file.Files;
 
 public class UtilsTest {
 
     @Test
     public void createTempFile() throws IOException {
         final File file = Utils.createTempFile();
-        final OutputStream stream = new BufferedOutputStream(new FileOutputStream(file));
 
-        try {
+        try (final OutputStream stream = new BufferedOutputStream(Files.newOutputStream(file.toPath()))) {
             final ByteArrayInputStream entityStream = new ByteArrayInputStream("Test stream byte input".getBytes());
             ReaderWriter.writeTo(entityStream, stream);
-        } finally {
-            stream.close();
         }
         Assertions.assertTrue(file.exists());
     }

core-server/src/main/java/org/glassfish/jersey/server/internal/scanning/FileSchemeResourceFinderFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2018 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -17,10 +17,10 @@
 package org.glassfish.jersey.server.internal.scanning;
 
 import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
 import java.io.InputStream;
+import java.io.IOException;
 import java.net.URI;
+import java.nio.file.Files;
 import java.util.Collections;
 import java.util.NoSuchElementException;
 import java.util.Set;
@@ -140,8 +140,8 @@ public String next() {
                 @Override
                 public InputStream open() {
                     try {
-                        return new FileInputStream(current);
-                    } catch (final FileNotFoundException e) {
+                        return Files.newInputStream(current.toPath());
+                    } catch (final IOException e) {
                         throw new ResourceFinderException(e);
                     }
                 }

core-server/src/main/java/org/glassfish/jersey/server/internal/scanning/FilesScanner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2018 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -17,10 +17,9 @@
 package org.glassfish.jersey.server.internal.scanning;
 
 import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.file.Files;
 import java.util.NoSuchElementException;
 import java.util.Stack;
 
@@ -60,7 +59,7 @@ public FilesScanner(final String[] fileNames, final boolean recursive) {
     private void processFile(final File f) {
         if (f.getName().endsWith(".jar") || f.getName().endsWith(".zip")) {
             try {
-                compositeResourceFinder.push(new JarFileScanner(new FileInputStream(f), "", true));
+                compositeResourceFinder.push(new JarFileScanner(Files.newInputStream(f.toPath()), "", true));
             } catch (final IOException e) {
                 // logging might be sufficient in this case
                 throw new ResourceFinderException(e);
@@ -117,8 +116,8 @@ public String next() {
                 @Override
                 public InputStream open() {
                     try {
-                        return new FileInputStream(current);
-                    } catch (final FileNotFoundException e) {
+                        return Files.newInputStream(current.toPath());
+                    } catch (final IOException e) {
                         throw new ResourceFinderException(e);
                     }
                 }

core-server/src/main/java/org/glassfish/jersey/server/internal/scanning/JarZipSchemeResourceFinderFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2018 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -16,12 +16,13 @@
 
 package org.glassfish.jersey.server.internal.scanning;
 
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashSet;
@@ -140,7 +141,7 @@ public void reset() {
      * if that fails with a {@link java.net.MalformedURLException} then the method will
      * attempt to create a {@link InputStream} instance as follows:
      * <pre>
-     *  return new new FileInputStream(
+     *  return Files.newInputStream(
      *      UriComponent.decode(jarUrlString, UriComponent.Type.PATH)));
      * </pre>
      *
@@ -153,8 +154,8 @@ private InputStream getInputStream(final String jarUrlString) throws IOException
         try {
             return new URL(jarUrlString).openStream();
         } catch (final MalformedURLException e) {
-            return new FileInputStream(
-                    UriComponent.decode(jarUrlString, UriComponent.Type.PATH));
+            return Files.newInputStream(
+                    Paths.get(UriComponent.decode(jarUrlString, UriComponent.Type.PATH)));
         }
     }
 }

core-server/src/main/java/org/glassfish/jersey/server/wadl/internal/generators/WadlGeneratorApplicationDoc.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2018 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -17,8 +17,8 @@
 package org.glassfish.jersey.server.wadl.internal.generators;
 
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.InputStream;
+import java.nio.file.Files;
 import java.util.List;
 
 import javax.ws.rs.core.Context;
@@ -103,7 +103,7 @@ public void init() throws Exception {
 
         InputStream inputStream;
         if (_applicationDocsFile != null) {
-            inputStream = new FileInputStream(_applicationDocsFile);
+            inputStream = Files.newInputStream(_applicationDocsFile.toPath());
         } else {
             inputStream = _applicationDocsStream;
         }

core-server/src/main/java/org/glassfish/jersey/server/wadl/internal/generators/WadlGeneratorGrammarsSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2018 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -17,8 +17,8 @@
 package org.glassfish.jersey.server.wadl.internal.generators;
 
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.InputStream;
+import java.nio.file.Files;
 import java.util.List;
 import java.util.logging.Logger;
 
@@ -116,7 +116,7 @@ public void init() throws Exception {
                     + " is set, one of both is required.");
         }
         _delegate.init();
-        _grammars = WadlUtils.unmarshall(_grammarsFile != null ? new FileInputStream(_grammarsFile) : _grammarsStream,
+        _grammars = WadlUtils.unmarshall(_grammarsFile != null ? Files.newInputStream(_grammarsFile.toPath()) : _grammarsStream,
                 saxFactoryProvider.get(), Grammars.class);
     }