在c3p0連接池中設置SQLite連接屬性

Question

要指定SQLite連接屬性，請使用org.sqlite.SQLiteConfig，它是這樣的：

    org.sqlite.SQLiteConfig config = new org.sqlite.SQLiteConfig();
    config.setReadOnly(true);
    config.setPageSize(4096); //in bytes
    config.setCacheSize(2000); //number of pages
    config.setSynchronous(SQLiteConfig.SynchronousMode.OFF);
    config.setJournalMode(SQLiteConfig.JournalMode.OFF);
    SQLiteConnectionPoolDataSource dataSource = new SQLiteConnectionPoolDataSource();

使用c3p0創建連接池的方法如下：

        ComboPooledDataSource cpds = new ComboPooledDataSource();
        cpds.setDriverClass("org.sqlite.JDBC");
        cpds.setJdbcUrl("jdbc:sqlite:/foo/bar");
        cpds.setMaxPoolSize(10);

問題：如何創建一個結合了兩者的DataSource，讓我設置連接池的max-pool-size和sqlite的同步模式？

Answer 1

嘗試

//put the imports where they really go, obviously...
import javax.sql.*;
import org.sqlite.*;
import com.mchange.v2.c3p0.*;

// configure SQLite
SQLiteConfig config = new org.sqlite.SQLiteConfig();
config.setReadOnly(true);
config.setPageSize(4096); //in bytes
config.setCacheSize(2000); //number of pages
config.setSynchronous(SQLiteConfig.SynchronousMode.OFF);
config.setJournalMode(SQLiteConfig.JournalMode.OFF);

// get an unpooled SQLite DataSource with the desired configuration
SQLiteDataSource unpooled = new SQLiteDataSource( config );

// get a pooled c3p0 DataSource that wraps the unpooled SQLite DataSource
DataSource pooled = DataSources.pooledDataSource( unpooled );

現在pooled的DataSource將是一個c3p0 PooledDataSource，它包裝了一個已根據需要配置的SQLite非池化數據源。

請參閱C3P0的文檔， “使用數據源工廠類” ，並為API文檔數據源工廠類。

另請參閱SQLite JDBC的javadoc，我從這里下載以回答這個問題。