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(1)我需要將Esper數據庫適配器連接到我的項目。使用this 爲指導IM,但我不知道在哪裏可以找到的配置文件,因爲即時得到這個錯誤:Cannot locate configuration information for database 'db1'
將Esper與PostgreSQL連接
這是我
public class Esper {
public void iniciar() {
EPServiceProvider epService = EPServiceProviderManager.getDefaultProvider();
ConfigurationDBAdapter adapterConfig = new ConfigurationDBAdapter();
ConfigurationDBRef configDB = new ConfigurationDBRef();
configDB.setDriverManagerConnection("org.postgresql.Driver",
"jdbc:postgresql://localhost:5432/db_name",
"user",
"pass");
adapterConfig.getJdbcConnections().put("db1", configDB);
EsperIODBAdapter dbAdapter = new EsperIODBAdapter(adapterConfig, "engineURI");
dbAdapter.start();
String expression = "select * from pattern[every timer :interval(10)], sql:db1 ['select mosquitoId from registros where velocidad > 50']";
EPStatement stmt = epService.getEPAdministrator().createEPL(expression);
Mylistener listener = new Mylistener();
stmt.addListener(listener);
}
}
(2)我需要做的是什麼從表Registros
得到數據,如果velocidad > 50
使用printLn(),我不明白在例子中pattern
是什麼。
也許你不得不使用'sql:db_name'來代替'sql:db1'? –
@YCF_L nop,我已經試過了 –