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https://github.com/alibaba/druid.git
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仿照ibatis的风格实现Log，以及添加ConnectionChecker
git-svn-id: http://code.alibabatech.com/svn/druid/trunk@292 b9813039-fb51-4c41-a8b9-e21c2acb5095
This commit is contained in:
wenshao
@@ -0,0 +1,17 @@
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package com.alibaba.druid.logging;
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public interface Log {
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boolean isDebugEnabled();
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void error(String s, Throwable e);
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void error(String s);
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public void debug(String s);
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public void warn(String s);
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void warn(String s, Throwable e);
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}
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@@ -0,0 +1,65 @@
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package com.alibaba.druid.logging;
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import java.lang.reflect.Constructor;
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public class LogFactory {
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private static Constructor logConstructor;
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static {
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tryImplementation("org.apache.commons.logging.LogFactory",
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"com.ibatis.common.logging.jakarta.JakartaCommonsLoggingImpl");
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tryImplementation("org.apache.log4j.Logger", "com.ibatis.common.logging.log4j.Log4jImpl");
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tryImplementation("java.util.logging.Logger", "com.ibatis.common.logging.jdk14.Jdk14LoggingImpl");
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tryImplementation("java.lang.Object", "com.ibatis.common.logging.nologging.NoLoggingImpl");
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}
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private static void tryImplementation(String testClassName, String implClassName) {
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if (logConstructor == null) {
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try {
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Resources.classForName(testClassName);
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Class implClass = Resources.classForName(implClassName);
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logConstructor = implClass.getConstructor(new Class[] { Class.class });
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} catch (Throwable t) {
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}
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}
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}
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public static Log getLog(Class aClass) {
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try {
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return (Log) logConstructor.newInstance(new Object[] { aClass });
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} catch (Throwable t) {
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throw new RuntimeException("Error creating logger for class " + aClass + ". Cause: " + t, t);
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}
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}
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/**
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* This method will switch the logging implementation to Log4J if Log4J is available on the classpath. This is
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* useful in situations where you want to use Log4J to log iBATIS activity but commons logging is on the classpath.
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* Note that this method is only effective for log classes obtained after calling this method. If you intend to use
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* this method you should call it before calling any other iBATIS method.
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*/
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public static synchronized void selectLog4JLogging() {
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try {
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Resources.classForName("org.apache.log4j.Logger");
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Class implClass = Resources.classForName("com.ibatis.common.logging.log4j.Log4jImpl");
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logConstructor = implClass.getConstructor(new Class[] { Class.class });
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} catch (Throwable t) {
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}
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}
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/**
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* This method will switch the logging implementation to Java native logging if you are running in JRE 1.4 or above.
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* This is useful in situations where you want to use Java native logging to log iBATIS activity but commons logging
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* or Log4J is on the classpath. Note that this method is only effective for log classes obtained after calling this
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* method. If you intend to use this method you should call it before calling any other iBATIS method.
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*/
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public static synchronized void selectJavaLogging() {
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try {
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Resources.classForName("java.util.logging.Logger");
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Class implClass = Resources.classForName("com.ibatis.common.logging.jdk14.Jdk14LoggingImpl");
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logConstructor = implClass.getConstructor(new Class[] { Class.class });
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} catch (Throwable t) {
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}
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}
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}
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@@ -0,0 +1,308 @@
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package com.alibaba.druid.logging;
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import java.io.*;
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import java.net.URL;
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import java.net.URLConnection;
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import java.nio.charset.Charset;
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import java.util.Properties;
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/**
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* A class to simplify access to resources through the classloader.
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*/
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public class Resources extends Object {
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private static ClassLoader defaultClassLoader;
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/**
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* Charset to use when calling getResourceAsReader.
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* null means use the system default.
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*/
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private static Charset charset;
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private Resources() {
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}
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/**
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* Returns the default classloader (may be null).
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*
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* @return The default classloader
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*/
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public static ClassLoader getDefaultClassLoader() {
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return defaultClassLoader;
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}
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/**
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* Sets the default classloader
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*
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* @param defaultClassLoader - the new default ClassLoader
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*/
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public static void setDefaultClassLoader(ClassLoader defaultClassLoader) {
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Resources.defaultClassLoader = defaultClassLoader;
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}
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/**
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* Returns the URL of the resource on the classpath
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*
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* @param resource The resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static URL getResourceURL(String resource) throws IOException {
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return getResourceURL(getClassLoader(), resource);
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}
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/**
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* Returns the URL of the resource on the classpath
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*
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* @param loader The classloader used to load the resource
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* @param resource The resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static URL getResourceURL(ClassLoader loader, String resource) throws IOException {
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URL url = null;
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if (loader != null) url = loader.getResource(resource);
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if (url == null) url = ClassLoader.getSystemResource(resource);
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if (url == null) throw new IOException("Could not find resource " + resource);
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return url;
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}
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/**
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* Returns a resource on the classpath as a Stream object
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*
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* @param resource The resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static InputStream getResourceAsStream(String resource) throws IOException {
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return getResourceAsStream(getClassLoader(), resource);
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}
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/**
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* Returns a resource on the classpath as a Stream object
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*
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* @param loader The classloader used to load the resource
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* @param resource The resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static InputStream getResourceAsStream(ClassLoader loader, String resource) throws IOException {
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InputStream in = null;
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if (loader != null) in = loader.getResourceAsStream(resource);
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if (in == null) in = ClassLoader.getSystemResourceAsStream(resource);
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if (in == null) throw new IOException("Could not find resource " + resource);
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return in;
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}
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/**
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* Returns a resource on the classpath as a Properties object
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*
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* @param resource The resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static Properties getResourceAsProperties(String resource)
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throws IOException {
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Properties props = new Properties();
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InputStream in = null;
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String propfile = resource;
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in = getResourceAsStream(propfile);
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props.load(in);
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in.close();
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return props;
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}
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/**
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* Returns a resource on the classpath as a Properties object
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*
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* @param loader The classloader used to load the resource
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* @param resource The resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static Properties getResourceAsProperties(ClassLoader loader, String resource)
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throws IOException {
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Properties props = new Properties();
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InputStream in = null;
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String propfile = resource;
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in = getResourceAsStream(loader, propfile);
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props.load(in);
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in.close();
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return props;
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}
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/**
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* Returns a resource on the classpath as a Reader object
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*
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* @param resource The resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static Reader getResourceAsReader(String resource) throws IOException {
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Reader reader;
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if (charset == null) {
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reader = new InputStreamReader(getResourceAsStream(resource));
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} else {
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reader = new InputStreamReader(getResourceAsStream(resource), charset);
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}
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return reader;
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}
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/**
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* Returns a resource on the classpath as a Reader object
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*
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* @param loader The classloader used to load the resource
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* @param resource The resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static Reader getResourceAsReader(ClassLoader loader, String resource) throws IOException {
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Reader reader;
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if (charset == null) {
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reader = new InputStreamReader(getResourceAsStream(loader, resource));
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} else {
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reader = new InputStreamReader(getResourceAsStream(loader, resource), charset);
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}
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return reader;
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}
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/**
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* Returns a resource on the classpath as a File object
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*
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* @param resource The resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static File getResourceAsFile(String resource) throws IOException {
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return new File(getResourceURL(resource).getFile());
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}
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/**
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* Returns a resource on the classpath as a File object
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*
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* @param loader - the classloader used to load the resource
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* @param resource - the resource to find
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* @return The resource
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* @throws IOException If the resource cannot be found or read
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*/
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public static File getResourceAsFile(ClassLoader loader, String resource) throws IOException {
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return new File(getResourceURL(loader, resource).getFile());
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}
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/**
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* Gets a URL as an input stream
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*
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* @param urlString - the URL to get
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* @return An input stream with the data from the URL
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* @throws IOException If the resource cannot be found or read
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*/
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public static InputStream getUrlAsStream(String urlString) throws IOException {
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URL url = new URL(urlString);
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URLConnection conn = url.openConnection();
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return conn.getInputStream();
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}
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/**
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* Gets a URL as a Reader
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*
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* @param urlString - the URL to get
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* @return A Reader with the data from the URL
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* @throws IOException If the resource cannot be found or read
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*/
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public static Reader getUrlAsReader(String urlString) throws IOException {
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return new InputStreamReader(getUrlAsStream(urlString));
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}
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/**
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* Gets a URL as a Properties object
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*
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* @param urlString - the URL to get
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* @return A Properties object with the data from the URL
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* @throws IOException If the resource cannot be found or read
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*/
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public static Properties getUrlAsProperties(String urlString) throws IOException {
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Properties props = new Properties();
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InputStream in = null;
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String propfile = urlString;
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in = getUrlAsStream(propfile);
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props.load(in);
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in.close();
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return props;
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}
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/**
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* Loads a class
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*
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* @param className - the class to load
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* @return The loaded class
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* @throws ClassNotFoundException If the class cannot be found (duh!)
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*/
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public static Class classForName(String className) throws ClassNotFoundException {
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Class clazz = null;
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try {
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clazz = getClassLoader().loadClass(className);
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} catch (Exception e) {
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// Ignore. Failsafe below.
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}
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if (clazz == null) {
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clazz = Class.forName(className);
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}
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return clazz;
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}
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/**
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* Creates an instance of a class
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*
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* @param className - the class to create
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* @return An instance of the class
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* @throws ClassNotFoundException If the class cannot be found (duh!)
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* @throws InstantiationException If the class cannot be instantiaed
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* @throws IllegalAccessException If the class is not public, or other access problems arise
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*/
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public static Object instantiate(String className)
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throws ClassNotFoundException, InstantiationException, IllegalAccessException {
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return instantiate(classForName(className));
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}
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/**
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* Creates an instance of a class
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*
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* @param clazz - the class to create
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* @return An instance of the class
|
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* @throws InstantiationException If the class cannot be instantiaed
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* @throws IllegalAccessException If the class is not public, or other access problems arise
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*/
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public static Object instantiate(Class clazz)
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throws InstantiationException, IllegalAccessException {
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return clazz.newInstance();
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}
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private static ClassLoader getClassLoader() {
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if (defaultClassLoader != null) {
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return defaultClassLoader;
|
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} else {
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return Thread.currentThread().getContextClassLoader();
|
||||
}
|
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}
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public static Charset getCharset() {
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return charset;
|
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}
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/**
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* Use this method to set the Charset to be used when
|
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* calling the getResourceAsReader methods. This will
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* allow iBATIS to function properly when the system default
|
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* encoding doesn't deal well with unicode (IBATIS-340, IBATIS-349)
|
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*
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* @param charset
|
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*/
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public static void setCharset(Charset charset) {
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Resources.charset = charset;
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||||
}
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}
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@@ -0,0 +1,8 @@
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package com.alibaba.druid.pool;
|
||||
|
||||
import java.sql.Connection;
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import java.sql.SQLException;
|
||||
|
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public interface ValidConnectionChecker {
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SQLException isValidConnection(Connection c);
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}
|
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@@ -0,0 +1,67 @@
|
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/*
|
||||
* JBoss, Home of Professional Open Source.
|
||||
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
|
||||
* as indicated by the @author tags. See the copyright.txt file in the
|
||||
* distribution for a full listing of individual contributors.
|
||||
*
|
||||
* This is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation; either version 2.1 of
|
||||
* the License, or (at your option) any later version.
|
||||
*
|
||||
* This software is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this software; if not, write to the Free
|
||||
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
||||
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
|
||||
*/
|
||||
package com.alibaba.druid.pool.vendor;
|
||||
|
||||
import java.io.Serializable;
|
||||
import java.sql.Connection;
|
||||
import java.sql.SQLException;
|
||||
import java.sql.Statement;
|
||||
|
||||
import com.alibaba.druid.logging.Log;
|
||||
import com.alibaba.druid.logging.LogFactory;
|
||||
import com.alibaba.druid.pool.ValidConnectionChecker;
|
||||
import com.alibaba.druid.util.JdbcUtils;
|
||||
|
||||
/**
|
||||
* A MSSQLValidConnectionChecker.
|
||||
*
|
||||
* @author <a href="weston.price@jboss.com">Weston Price</a>
|
||||
* @version $Revision: 57189 $
|
||||
*/
|
||||
public class MSSQLValidConnectionChecker implements ValidConnectionChecker, Serializable {
|
||||
|
||||
private static final String QUERY = "SELECT x";
|
||||
private static final Log LOG = LogFactory.getLog(MSSQLValidConnectionChecker.class);
|
||||
|
||||
/** The serialVersionUID */
|
||||
private static final long serialVersionUID = 3995516551833725723L;
|
||||
|
||||
public SQLException isValidConnection(final Connection c) {
|
||||
SQLException sqe = null;
|
||||
Statement stmt = null;
|
||||
|
||||
try {
|
||||
stmt = c.createStatement();
|
||||
stmt.execute(QUERY);
|
||||
}
|
||||
|
||||
catch (SQLException e) {
|
||||
LOG.warn("warning: connection validation failed for current managed connection.");
|
||||
sqe = e;
|
||||
} finally {
|
||||
JdbcUtils.close(stmt);
|
||||
}
|
||||
|
||||
return sqe;
|
||||
}
|
||||
|
||||
}
|
||||
@@ -0,0 +1,76 @@
|
||||
package com.alibaba.druid.pool.vendor;
|
||||
|
||||
import java.io.Serializable;
|
||||
import java.lang.reflect.Method;
|
||||
import java.sql.Connection;
|
||||
import java.sql.ResultSet;
|
||||
import java.sql.SQLException;
|
||||
import java.sql.Statement;
|
||||
|
||||
import com.alibaba.druid.logging.Log;
|
||||
import com.alibaba.druid.logging.LogFactory;
|
||||
import com.alibaba.druid.pool.ValidConnectionChecker;
|
||||
import com.alibaba.druid.util.JdbcUtils;
|
||||
|
||||
public class MySQLValidConnectionChecker implements ValidConnectionChecker, Serializable {
|
||||
|
||||
private static final long serialVersionUID = 1L;
|
||||
private static final Log LOG = LogFactory.getLog(MySQLValidConnectionChecker.class);
|
||||
|
||||
private Method ping;
|
||||
private boolean driverHasPingMethod = false;
|
||||
|
||||
// The timeout (apparently the timeout is ignored?)
|
||||
private static Object[] params = new Object[] {};
|
||||
|
||||
@SuppressWarnings({ "unchecked", "rawtypes" })
|
||||
public MySQLValidConnectionChecker(){
|
||||
try {
|
||||
Class mysqlConnection = Thread.currentThread().getContextClassLoader().loadClass("com.mysql.jdbc.Connection");
|
||||
ping = mysqlConnection.getMethod("ping", new Class[] {});
|
||||
if (ping != null) {
|
||||
driverHasPingMethod = true;
|
||||
}
|
||||
} catch (Exception e) {
|
||||
LOG.warn("Cannot resolve com.mysq.jdbc.Connection.ping method. Will use 'SELECT 1' instead.", e);
|
||||
}
|
||||
}
|
||||
|
||||
public SQLException isValidConnection(Connection c) {
|
||||
// if there is a ping method then use it, otherwise just use a 'SELECT 1' statement
|
||||
if (driverHasPingMethod) {
|
||||
try {
|
||||
ping.invoke(c, params);
|
||||
} catch (Exception e) {
|
||||
if (e instanceof SQLException) {
|
||||
return (SQLException) e;
|
||||
} else {
|
||||
LOG.warn("Unexpected error in ping", e);
|
||||
return new SQLException("ping failed: " + e.toString());
|
||||
}
|
||||
}
|
||||
|
||||
} else {
|
||||
|
||||
Statement stmt = null;
|
||||
ResultSet rs = null;
|
||||
try {
|
||||
stmt = c.createStatement();
|
||||
rs = stmt.executeQuery("SELECT 1");
|
||||
} catch (Exception e) {
|
||||
if (e instanceof SQLException) {
|
||||
return (SQLException) e;
|
||||
} else {
|
||||
LOG.warn("Unexpected error in ping (SELECT 1)", e);
|
||||
return new SQLException("ping (SELECT 1) failed: " + e.toString());
|
||||
}
|
||||
} finally {
|
||||
JdbcUtils.close(rs);
|
||||
JdbcUtils.close(stmt);
|
||||
}
|
||||
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
}
|
||||
+67
@@ -0,0 +1,67 @@
|
||||
/*
|
||||
* JBoss, Home of Professional Open Source.
|
||||
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
|
||||
* as indicated by the @author tags. See the copyright.txt file in the
|
||||
* distribution for a full listing of individual contributors.
|
||||
*
|
||||
* This is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation; either version 2.1 of
|
||||
* the License, or (at your option) any later version.
|
||||
*
|
||||
* This software is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this software; if not, write to the Free
|
||||
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
||||
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
|
||||
*/
|
||||
package com.alibaba.druid.pool.vendor;
|
||||
|
||||
import java.io.Serializable;
|
||||
import java.lang.reflect.Method;
|
||||
import java.sql.Connection;
|
||||
import java.sql.SQLException;
|
||||
|
||||
import com.alibaba.druid.logging.Log;
|
||||
import com.alibaba.druid.logging.LogFactory;
|
||||
import com.alibaba.druid.pool.ValidConnectionChecker;
|
||||
|
||||
public class OracleValidConnectionChecker implements ValidConnectionChecker, Serializable {
|
||||
|
||||
private static final long serialVersionUID = -2227528634302168877L;
|
||||
|
||||
private static final Log LOG = LogFactory.getLog(OracleValidConnectionChecker.class);
|
||||
|
||||
private Method ping;
|
||||
|
||||
// The timeout (apparently the timeout is ignored?)
|
||||
private static Object[] params = new Object[] { new Integer(5000) };
|
||||
|
||||
@SuppressWarnings({ "unchecked", "rawtypes" })
|
||||
public OracleValidConnectionChecker(){
|
||||
try {
|
||||
Class oracleConnection = Thread.currentThread().getContextClassLoader().loadClass("oracle.jdbc.driver.OracleConnection");
|
||||
ping = oracleConnection.getMethod("pingDatabase", new Class[] { Integer.TYPE });
|
||||
} catch (Exception e) {
|
||||
throw new RuntimeException("Unable to resolve pingDatabase method:", e);
|
||||
}
|
||||
}
|
||||
|
||||
public SQLException isValidConnection(Connection c) {
|
||||
try {
|
||||
Integer status = (Integer) ping.invoke(c, params);
|
||||
|
||||
// Error
|
||||
if (status.intValue() < 0) return new SQLException("pingDatabase failed status=" + status);
|
||||
} catch (Exception e) {
|
||||
LOG.warn("Unexpected error in pingDatabase", e);
|
||||
}
|
||||
|
||||
// OK
|
||||
return null;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user