AOP@Work: 用AspectJ进行性能监视，第1部分 - 编程入门网
作者 佚名技术
来源 NET编程
浏览
发布时间 2012-06-15
| SourceConnectionCall(DataSource dataSource) : call(Connection+ DataSource.getConnection (..)) && target(dataSource); /** A call to establish a connection using a URL string */ public pointcut directConnectionCall(String url) : (call(Connection+ Driver.connect(..)) || call(Connection+ DriverManager.getConnection(..))) && args(url, ..); /** A database connection call nested beneath another one * (common with proxies). */ public pointcut nestedConnectionCall() : cflowbelow (dataSourceConnectionCall(*) || directConnectionCall (*)); /** Monitor data source connections using * the worker object pattern */ Connection around(final DataSource dataSource) : dataSourceConnectionCall(dataSource) && !nestedConnectionCall() { RequestContext requestContext = new ConnectionRequestContext() { public Object doExecute() { accessingConnection(dataSource); // set up stats early in case needed Connection connection = proceed(dataSource); return addConnection(connection); } }; return (Connection)requestContext.execute(); } /** Monitor url connections using the worker object pattern */ Connection around(final String url) : directConnectionCall(url) && !nestedConnectionCall() { RequestContext requestContext = new ConnectionRequestContext() { public Object doExecute() { accessingConnection(url); Connection connection = proceed(url); return addConnection (connection); } }; return (Connection)requestContext.execute(); } /** Get stored name associated with this data source. */ public String getDatabaseName(Connection connection) { synchronized (connections) { return (String)connections.get (connection); } } /** Use common accessors to return meaningful name * for the resource accessed by this data source. */ public String getNameForDataSource (DataSource ds) { // methods used to get names are listed in descending // preference order String possibleNames[] = { "getDatabaseName", "getDatabasename", "getUrl", "getURL", "getDataSourceName", "getDescription" }; String name = null; for (int i=0; name == null && i<possibleNames.length; i++) { try { Method method = ds.getClass().getMethod(possibleNames[i], null); name = (String)method.invoke(ds, null); } catch (Exception e) { // keep trying } } retur |
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