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
| && target (connection); /** * Track origin of statements, to properly * associate statistics even in * the presence of wrapped connections */ after(Connection connection) returning (Statement statement): callCreateStatement (connection) { synchronized (JdbcStatementMonitor.this) { statementCreators.put(statement, connection); } } /** * A call to prepare a statement. * @param sql The SQL string prepared by the statement. */ public pointcut callCreatePreparedStatement(String sql): call(PreparedStatement+ Connection.*(String, ..)) && args(sql, ..); /** Track SQL used to prepare a prepared statement */ after(String sql) returning (PreparedStatement statement): callCreatePreparedStatement (sql) { setUpStatement(statement, sql); } protected abstract class StatementRequestContext extends RequestContext { /** * Find statistics for this statement, looking for its * SQL string in the parent request''s statistics context */ protected PerfStats lookupStats() { if (getParent() != null) { Connection connection = null; String sql = null; synchronized (JdbcStatementMonitor.this) { connection = (Connection) statementCreators.get(statement); sql = (String) statementSql.get(statement); } if (connection != null) { String databaseName = JdbcConnectionMonitor.aspectOf (). getDatabaseName(connection); if (databaseName != null && sql != null) { OperationStats opStats = (OperationStats) getParent().getStats(); if (opStats != null) { ResourceStats dbStats = opStats.getDatabaseStats (databaseName); return dbStats.getRequestStats(sql); } } } } return null; } } /** * To group sensibly and to avoid recording sensitive data, * I don''t record the where clause (only used for dynamic * SQL since parameters aren''t included * in prepared statements) * @return subset of passed SQL up to the where clause */ public static String stripAfterWhere(String sql) { for (int i=0; i<sql.length()-4; i++) { if (sql.charAt(i)==''w'' || sql.charAt(i)== ''W'') { if (sql.substring(i+1, i+5).equalsIgnoreCase( "here")) { sql = sql.substring(0, i); } } } return sql; } private syn |
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