Add a simple DataSource implementation

Implement the DataSource interface to be more compatible with JDBC spec.

Add JDBC standard and Tarantool specific properties (getters/setters) to
follow enterprise features (according to JavaBeans spec).

Fix a JDBC URL scheme. Now correct scheme has the format like
'jdbc:tarantool://' where `tarantool` is JDBC sub-protocol. Old scheme
version `tarantool://` was not JDBC-compatible.

Closes: #175

Author: nicktorwald

Diff for: README.md

@@ -138,13 +138,13 @@ To configure socket channel provider you should implements SocketChannelProvider
 For example:
 
 ```
-tarantool://localhost:3301?user=test&password=test&socketProvider=abc.xyz.MySocketProvider
+jdbc:tarantool://localhost:3301?user=test&password=test&socketProvider=abc.xyz.MySocketProvider
 ```
 
 Here is an example how you can use the driver covered by Spring `DriverManagerDataSource`:
 
 ```java
-NamedParameterJdbcTemplate template = new NamedParameterJdbcTemplate(new DriverManagerDataSource("tarantool://localhost:3301?user=test&password=test"));
+NamedParameterJdbcTemplate template = new NamedParameterJdbcTemplate(new DriverManagerDataSource("jdbc:tarantool://localhost:3301?user=test&password=test"));
 RowMapper<Object> rowMapper = new RowMapper<Object>() {
     @Override
     public Object mapRow(ResultSet resultSet, int i) throws SQLException {

Diff for: src/it/java/org/tarantool/TestSql.java

@@ -36,7 +36,7 @@
 //
 //    public static void main(String[] args) throws IOException, SQLException {
 //
-//        NamedParameterJdbcTemplate template = new NamedParameterJdbcTemplate(new DriverManagerDataSource("tarantool://localhost:3301?username=test&password=test&socketProvider=org.tarantool.TestSql$TestSocketProvider"));
+//        NamedParameterJdbcTemplate template = new NamedParameterJdbcTemplate(new DriverManagerDataSource("jdbc:tarantool://localhost:3301?username=test&password=test&socketProvider=org.tarantool.TestSql$TestSocketProvider"));
 //        RowMapper<Object> rowMapper = new RowMapper<Object>() {
 //            @Override
 //            public Object mapRow(ResultSet resultSet, int i) throws SQLException {

Diff for: src/main/java/org/tarantool/jdbc/SQLConnection.java

@@ -58,7 +58,7 @@ public class SQLConnection implements Connection {
     private DatabaseMetaData cachedMetadata;
     private int resultSetHoldability = UNSET_HOLDABILITY;
 
-    SQLConnection(String url, Properties properties) throws SQLException {
+    public SQLConnection(String url, Properties properties) throws SQLException {
         this.url = url;
         this.properties = properties;
 

Diff for: src/main/java/org/tarantool/jdbc/SQLConstant.java

@@ -0,0 +1,10 @@
+package org.tarantool.jdbc;
+
+public class SQLConstant {
+
+    private SQLConstant() {
+    }
+
+    public static final String DRIVER_NAME = "Tarantool JDBC Driver";
+
+}

Diff for: src/main/java/org/tarantool/jdbc/SQLDatabaseMetadata.java

@@ -96,7 +96,7 @@ public String getDatabaseProductVersion() throws SQLException {
 
     @Override
     public String getDriverName() throws SQLException {
-        return "tarantool-java";
+        return SQLConstant.DRIVER_NAME;
     }
 
     @Override

Diff for: src/main/java/org/tarantool/jdbc/SQLDriver.java

@@ -57,6 +57,9 @@ protected SQLTarantoolClientImpl makeSqlClient(String address, TarantoolClientCo
     protected Properties parseQueryString(URI uri, Properties info) throws SQLException {
         Properties urlProperties = new Properties();
 
+        // get scheme specific part (after the scheme part "jdbc:")
+        // to correct parse remaining URL
+        uri = URI.create(uri.getSchemeSpecificPart());
         String userInfo = uri.getUserInfo();
         if (userInfo != null) {
             // Get user and password from the corresponding part of the URI, i.e. before @ sign.
@@ -140,7 +143,7 @@ protected SocketChannelProvider getSocketProviderInstance(String className) thro
 
     @Override
     public boolean acceptsURL(String url) throws SQLException {
-        return url.toLowerCase().startsWith("tarantool:");
+        return url.toLowerCase().startsWith("jdbc:tarantool:");
     }
 
     @Override

Diff for: src/main/java/org/tarantool/jdbc/SQLProperty.java

@@ -44,7 +44,7 @@ public enum SQLProperty {
     LOGIN_TIMEOUT(
         "loginTimeout",
         "The number of milliseconds to wait for connection establishment. " +
-            "The default value is 60000 (1 minute).",
+            "The default system value is 60000 (1 minute).",
         "60000",
         null,
         false
@@ -84,6 +84,10 @@ public String getDefaultValue() {
         return defaultValue;
     }
 
+    public int getDefaultIntValue() {
+        return Integer.parseInt(defaultValue);
+    }
+
     public boolean isRequired() {
         return required;
     }

Diff for: src/main/java/org/tarantool/jdbc/ds/SQLDataSource.java

@@ -0,0 +1,159 @@
+package org.tarantool.jdbc.ds;
+
+import org.tarantool.jdbc.SQLConnection;
+import org.tarantool.jdbc.SQLConstant;
+import org.tarantool.jdbc.SQLProperty;
+
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.sql.SQLFeatureNotSupportedException;
+import java.sql.SQLNonTransientException;
+import java.util.Properties;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Logger;
+import javax.sql.DataSource;
+
+/**
+ * Simple {@code java.sql.DataSource} implementation.
+ */
+public class SQLDataSource implements TarantoolDataSource, DataSource {
+
+    private PrintWriter logWriter;
+    private String name = "Tarantool basic data source";
+
+    private Properties properties = new Properties();
+
+    @Override
+    public Connection getConnection() throws SQLException {
+        return new SQLConnection(makeUrl(), new Properties(properties));
+    }
+
+    @Override
+    public Connection getConnection(String username, String password) throws SQLException {
+        Properties copyProperties = new Properties(properties);
+        SQLProperty.USER.setString(copyProperties, username);
+        SQLProperty.PASSWORD.setString(copyProperties, password);
+        return new SQLConnection(makeUrl(), copyProperties);
+    }
+
+    @Override
+    public PrintWriter getLogWriter() {
+        return logWriter;
+    }
+
+    @Override
+    public void setLogWriter(PrintWriter out) {
+        logWriter = out;
+    }
+
+    @Override
+    public void setLoginTimeout(int seconds) {
+        SQLProperty.LOGIN_TIMEOUT.setInt(properties, (int) TimeUnit.SECONDS.toMillis(seconds));
+    }
+
+    @Override
+    public int getLoginTimeout() throws SQLException {
+        return (int) TimeUnit.MILLISECONDS.toSeconds(SQLProperty.LOGIN_TIMEOUT.getInt(properties));
+    }
+
+    @Override
+    public Logger getParentLogger() throws SQLFeatureNotSupportedException {
+        throw new SQLFeatureNotSupportedException();
+    }
+
+    @Override
+    public <T> T unwrap(Class<T> type) throws SQLException {
+        if (isWrapperFor(type)) {
+            return type.cast(this);
+        }
+        throw new SQLNonTransientException("Statement does not wrap " + type.getName());
+    }
+
+    @Override
+    public boolean isWrapperFor(Class<?> type) {
+        return type.isAssignableFrom(this.getClass());
+    }
+
+    @Override
+    public String getServerName() {
+        return SQLProperty.HOST.getString(properties);
+    }
+
+    @Override
+    public void setServerName(String serverName) {
+        SQLProperty.HOST.setString(properties, serverName);
+    }
+
+    @Override
+    public int getPortNumber() throws SQLException {
+        return SQLProperty.PORT.getInt(properties);
+    }
+
+    @Override
+    public void setPortNumber(int port) {
+        SQLProperty.PORT.setInt(properties, port);
+    }
+
+    @Override
+    public String getUser() {
+        return SQLProperty.USER.getString(properties);
+    }
+
+    @Override
+    public void setUser(String userName) {
+        SQLProperty.USER.setString(properties, userName);
+    }
+
+    @Override
+    public String getPassword() {
+        return SQLProperty.PASSWORD.getString(properties);
+    }
+
+    @Override
+    public void setPassword(String password) {
+        SQLProperty.PASSWORD.setString(properties, password);
+    }
+
+    @Override
+    public String getDescription() {
+        return "Basic DataSource implementation - produces a standard Connection object. " +
+            SQLConstant.DRIVER_NAME + ".";
+    }
+
+    @Override
+    public String getDataSourceName() {
+        return name;
+    }
+
+    @Override
+    public void setDataSourceName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String getSocketChannelProvider() {
+        return SQLProperty.SOCKET_CHANNEL_PROVIDER.getString(properties);
+    }
+
+    @Override
+    public void setSocketChannelProvider(String classFqdn) {
+        SQLProperty.SOCKET_CHANNEL_PROVIDER.setString(properties, classFqdn);
+    }
+
+    @Override
+    public int getQueryTimeout() throws SQLException {
+        return (int) TimeUnit.MILLISECONDS.toSeconds(SQLProperty.QUERY_TIMEOUT.getInt(properties));
+    }
+
+    @Override
+    public void setQueryTimeout(int seconds) {
+        SQLProperty.QUERY_TIMEOUT.setInt(properties, (int) TimeUnit.SECONDS.toMillis(seconds));
+    }
+
+    private String makeUrl() {
+        return "jdbc:tarantool://" +
+            SQLProperty.HOST.getString(properties) + ":" + SQLProperty.PORT.getString(properties);
+    }
+
+}

Diff for: src/main/java/org/tarantool/jdbc/ds/TarantoolDataSource.java

@@ -0,0 +1,40 @@
+package org.tarantool.jdbc.ds;
+
+import java.sql.SQLException;
+
+/**
+ * JDBC standard  Tarantool specific data source properties.
+ */
+public interface TarantoolDataSource {
+
+    String getServerName() throws SQLException;
+
+    void setServerName(String serverName) throws SQLException;
+
+    int getPortNumber() throws SQLException;
+
+    void setPortNumber(int port) throws SQLException;
+
+    String getUser() throws SQLException;
+
+    void setUser(String userName) throws SQLException;
+
+    String getPassword() throws SQLException;
+
+    void setPassword(String password) throws SQLException;
+
+    String getDescription() throws SQLException;
+
+    String getDataSourceName() throws SQLException;
+
+    void setDataSourceName(String name) throws SQLException;
+
+    String getSocketChannelProvider() throws SQLException;
+
+    void setSocketChannelProvider(String classFqdn) throws SQLException;
+
+    int getQueryTimeout() throws SQLException;
+
+    void setQueryTimeout(int seconds) throws SQLException;
+
+}

Diff for: src/test/java/org/tarantool/jdbc/AbstractJdbcIT.java

@@ -26,7 +26,7 @@ public abstract class AbstractJdbcIT {
     private static final Integer port = Integer.valueOf(System.getProperty("tntPort", "3301"));
     private static final String user = System.getProperty("tntUser", "test_admin");
     private static final String pass = System.getProperty("tntPass", "4pWBZmLEgkmKK5WP");
-    private static String URL = String.format("tarantool://%s:%d?user=%s&password=%s", host, port, user, pass);
+    private static String URL = String.format("jdbc:tarantool://%s:%d?user=%s&password=%s", host, port, user, pass);
 
     protected static final String LUA_FILE = "jdk-testing.lua";
     protected static final int LISTEN = 3301;

Diff for: src/test/java/org/tarantool/jdbc/JdbcDatabaseMetaDataIT.java

@@ -229,7 +229,7 @@ public void testGetDriverNameVersion() throws SQLException {
         String version = meta.getDriverVersion();
 
         // Verify driver name.
-        assertEquals("tarantool-java", name);
+        assertEquals(SQLConstant.DRIVER_NAME, name);
 
         // Verify driver version format.
         // E.g. 1.7.6 or 1.7.6-SNAPSHOT.