com.firstworks.sqlrelay

## Class SQLRConnection

- java.lang.Object
- - com.firstworks.sqlrelay.SQLRConnection

    public class SQLRConnection
    extends java.lang.Object

### Field Summary

Fields
`long` `connection` connection is used internally, it's just public to make the JNI wrapper work faster.

### Constructor Summary

Constructors
Constructor and Description
`SQLRConnection(java.lang.String server, short port, java.lang.String socket, java.lang.String user, java.lang.String password, int retrytime, int tries)` Initiates a connection to "server" on "port" or to the unix "socket" on the local machine and auths with "user" and "password".

### Method Summary

All Methods Instance Methods Concrete Methods
`boolean` `autoCommitOff()` Instructs the database to wait for the client to tell it when to commit.
`boolean` `autoCommitOn()` Instructs the database to perform a commit after every successful query.
`boolean` `begin()` Begins a transaction.
`java.lang.String` `bindFormat()` Returns a string representing the format of the bind variables used in the db.
`java.lang.String` `clientVersion()` Returns the version of the sqlrelay client software
`boolean` `commit()` Issues a commit.
`java.lang.String` `dbHostName()` Returns the host name of the database
`java.lang.String` `dbIpAddress()` Returns the ip address of the database
`java.lang.String` `dbVersion()` Returns the version of the database
`void` `debugOff()` Turns debugging off.
`void` `debugOn()` Causes verbose debugging information to be sent to standard output.
`void` `delete()` Disconnects and ends the session if it hasn't been ended already.
`void` `disableEncryption()` Disables encryption.
`void` `enableKerberos(java.lang.String service, java.lang.String mech, java.lang.String flags)` Enables Kerberos authentication and encryption.
`void` `enableTls(java.lang.String version, java.lang.String cert, java.lang.String password, java.lang.String ciphers, java.lang.String validate, java.lang.String ca, short depth)` Enables TLS/SSL encryption, and optionally authentication.
`void` `endSession()` Ends the session.
`java.lang.String` `errorMessage()` If an operation failed and generated an error, the error message is available here.
`long` `errorNumber()` If an operation failed and generated an error, the error number is available here.
`java.lang.String` `getClientInfo()` Returns the string that was set by setClientInfo().
`short` `getConnectionPort()` Returns the inet port that the connection is communicating over.
`java.lang.String` `getConnectionSocket()` Returns the unix socket that the connection is communicating over.
`java.lang.String` `getCurrentDatabase()` Returns the database/schema that is currently in use
`boolean` `getDebug()` Returns 0 if debugging is off and 1 if debugging is on.
`long` `getLastInsertId()` Returns the value of the autoincrement column for the last insert
`java.lang.String` `identify()` Returns the type of database: oracle, postgresql, mysql, etc.
`boolean` `ping()` Returns 1 if the database is up and 0 if it's down.
`boolean` `resumeSession(short port, java.lang.String socket)` Resumes a session previously left open using suspendSession().
`boolean` `rollback()` Issues a rollback.
`boolean` `selectDatabase(java.lang.String database)` Sets the current database/schema to "database"
`java.lang.String` `serverVersion()` Returns the version of the sqlrelay server software
`void` `setAuthenticationTimeout(int timeoutsec, int timeoutusec)` Sets the authentication timeout in seconds and milliseconds.
`boolean` `setClientInfo(java.lang.String clientinfo)` Allows you to set a string that will be passed to the server and ultimately included in server-side logging along with queries that were run by this instance of the client.
`void` `setConnectTimeout(int timeoutsec, int timeoutusec)` Sets the server connect timeout in seconds and milliseconds.
`boolean` `setDebugFile(java.lang.String debugfile)` Allows you to specify a file to write debug to.
`void` `setResponseTimeout(int timeoutsec, int timeoutusec)` Sets the response timeout (for queries, commits, rollbacks, pings, etc.) in seconds and milliseconds.
`boolean` `suspendSession()` Disconnects this connection from the current session but leaves the session open so that another connection can connect to it using resumeSession().

### Methods inherited from class java.lang.Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

### Field Detail

#### connection

    public long connection

connection is used internally, it's just public to make the JNI wrapper work faster.

### Constructor Detail

#### SQLRConnection

    public SQLRConnection(java.lang.String server,
                          short port,
                          java.lang.String socket,
                          java.lang.String user,
                          java.lang.String password,
                          int retrytime,
                          int tries)

Initiates a connection to "server" on "port" or to the unix "socket" on the local machine and auths with "user" and "password". Failed connections will be retried for "tries" times, waiting "retrytime" seconds between each try. If "tries" is 0 then retries will continue forever. If "retrytime" is 0 then retries will be attempted on a default interval. If the "socket" parameter is neither NULL nor "" then an attempt will be made to connect through it before attempting to connect to "server" on "port". If it is NULL or "" then no attempt will be made to connect through the socket.

### Method Detail

#### delete

    public void delete()

Disconnects and ends the session if it hasn't been ended already.

#### setConnectTimeout

    public void setConnectTimeout(int timeoutsec,
                                  int timeoutusec)

Sets the server connect timeout in seconds and milliseconds. Setting either parameter to -1 disables the timeout. You can also set this timeout using the SQLR_CLIENT_CONNECT_TIMEOUT environment variable.

#### setAuthenticationTimeout

    public void setAuthenticationTimeout(int timeoutsec,
                                         int timeoutusec)

Sets the authentication timeout in seconds and milliseconds. Setting either parameter to -1 disables the timeout. You can also set this timeout using the SQLR_CLIENT_AUTHENTICATION_TIMEOUT environment variable.

#### setResponseTimeout

    public void setResponseTimeout(int timeoutsec,
                                   int timeoutusec)

Sets the response timeout (for queries, commits, rollbacks, pings, etc.) in seconds and milliseconds. Setting either parameter to -1 disables the timeout. You can also set this timeout using the SQLR_CLIENT_RESPONSE_TIMEOUT environment variable.

#### enableKerberos

    public void enableKerberos(java.lang.String service,
                               java.lang.String mech,
                               java.lang.String flags)

Enables Kerberos authentication and encryption. "service" indicates the Kerberos service name of the SQL Relay server. If left empty or NULL then the service name "sqlrelay" will be used. "sqlrelay" is the default service name of the SQL Relay server. Note that on Windows platforms the service name must be fully qualified, including the host and realm name. For example: "sqlrelay/sqlrserver.firstworks.com@AD.FIRSTWORKS.COM". "mech" indicates the specific Kerberos mechanism to use. On Linux/Unix platforms, this should be a string representation of the mechnaism's OID, such as: { 1 2 840 113554 1 2 2 } On Windows platforms, this should be a string like: Kerberos If left empty or NULL then the default mechanism will be used. Only set this if you know that you have a good reason to. "flags" indicates what Kerberos flags to use. Multiple flags may be specified, separated by commas. If left empty or NULL then a defalt set of flags will be used. Only set this if you know that you have a good reason to. Valid flags include: * GSS_C_MUTUAL_FLAG * GSS_C_REPLAY_FLAG * GSS_C_SEQUENCE_FLAG * GSS_C_CONF_FLAG * GSS_C_INTEG_FLAG For a full list of flags, consult the GSSAPI documentation, though note that only the flags listed above are supported on Windows.

#### enableTls

    public void enableTls(java.lang.String version,
                          java.lang.String cert,
                          java.lang.String password,
                          java.lang.String ciphers,
                          java.lang.String validate,
                          java.lang.String ca,
                          short depth)

Enables TLS/SSL encryption, and optionally authentication. "version" specifies the TLS/SSL protocol version that the client will attempt to use. Valid values include SSL2, SSL3, TLS1, TLS1.1, TLS1.2 or any more recent version of TLS, as supported by and enabled in the underlying TLS/SSL library. If left blank or empty then the highest supported version will be negotiated. "cert" is the file name of the certificate chain file to send to the SQL Relay server. This is only necessary if the SQL Relay server is configured to authenticate and authorize clients by certificate. If "cert" contains a password-protected private key, then "password" may be supplied to access it. If the private key is not password-protected, then this argument is ignored, and may be left empty or NULL. "ciphers" is a list of ciphers to allow. Ciphers may be separated by spaces, commas, or colons. If "ciphers" is empty or NULL then a default set is used. Only set this if you know that you have a good reason to. For a list of valid ciphers on Linux/Unix platforms, see: man ciphers For a list of valid ciphers on Windows platforms, see: https://msdn.microsoft.com/en-us/library/windows/desktop/aa375549%28v=vs.85%29.aspx On Windows platforms, the ciphers (alg_id's) should omit CALG_ and may be given with underscores or dashes. For example: 3DES_112 "validate" indicates whether to validate the SQL Relay's server certificate, and may be set to one of the following: "no" - Don't validate the server's certificate. "ca" - Validate that the server's certificate was signed by a trusted certificate authority. "ca+host" - Perform "ca" validation and also validate that one of the subject altenate names (or the common name if no SANs are present) in the certificate matches the host parameter. (Falls back to "ca" validation when a unix socket is used.) "ca+domain" - Perform "ca" validation and also validate that the domain name of one of the subject alternate names (or the common name if no SANs are present) in the certificate matches the domain name of the host parameter. (Falls back to "ca" validation when a unix socket is used.) "ca" is the location of a certificate authority file to use, in addition to the system's root certificates, when validating the SQL Relay server's certificate. This is useful if the SQL Relay server's certificate is self-signed. On Windows, "ca" must be a file name. On non-Windows systems, "ca" can be either a file or directory name. If it is a directory name, then all certificate authority files found in that directory will be used. If it a file name, then only that file will be used. Note that the supported "cert" and "ca" file formats may vary between platforms. A variety of file formats are generally supported on Linux/Unix platfoms (.pem, .pfx, etc.) but only the .pfx format is currently supported on Windows.

#### disableEncryption

    public void disableEncryption()

Disables encryption.

#### endSession

    public void endSession()

Ends the session.

#### suspendSession

    public boolean suspendSession()

Disconnects this connection from the current session but leaves the session open so that another connection can connect to it using resumeSession().

#### getConnectionPort

    public short getConnectionPort()

Returns the inet port that the connection is communicating over. This parameter may be passed to another connection for use in the resumeSession() method. Note: the value returned by this method is only valid after a call to suspendSession().

#### getConnectionSocket

    public java.lang.String getConnectionSocket()

Returns the unix socket that the connection is communicating over. This parameter may be passed to another connection for use in the resumeSession() method. Note: the value returned by this method is only valid after a call to suspendSession().

#### resumeSession

    public boolean resumeSession(short port,
                                 java.lang.String socket)

Resumes a session previously left open using suspendSession(). Returns 1 on success and 0 on failure.

#### ping

    public boolean ping()

Returns 1 if the database is up and 0 if it's down.

#### identify

    public java.lang.String identify()

Returns the type of database: oracle, postgresql, mysql, etc.

#### dbVersion

    public java.lang.String dbVersion()

Returns the version of the database

#### dbHostName

    public java.lang.String dbHostName()

Returns the host name of the database

#### dbIpAddress

    public java.lang.String dbIpAddress()

Returns the ip address of the database

#### serverVersion

    public java.lang.String serverVersion()

Returns the version of the sqlrelay server software

#### clientVersion

    public java.lang.String clientVersion()

Returns the version of the sqlrelay client software

#### bindFormat

    public java.lang.String bindFormat()

Returns a string representing the format of the bind variables used in the db.

#### selectDatabase

    public boolean selectDatabase(java.lang.String database)

Sets the current database/schema to "database"

#### getCurrentDatabase

    public java.lang.String getCurrentDatabase()

Returns the database/schema that is currently in use

#### getLastInsertId

    public long getLastInsertId()

Returns the value of the autoincrement column for the last insert

#### autoCommitOn

    public boolean autoCommitOn()

Instructs the database to perform a commit after every successful query.

#### autoCommitOff

    public boolean autoCommitOff()

Instructs the database to wait for the client to tell it when to commit.

#### begin

    public boolean begin()

Begins a transaction. Returns true if the begin succeeded, false if it failed. If the database automatically begins a new transaction when a commit or rollback is issued then this doesn't do anything unless SQL Relay is faking transaction blocks.

#### commit

    public boolean commit()

Issues a commit. Returns true if the commit succeeded, false if it failed.

#### rollback

    public boolean rollback()

Issues a rollback. Returns true if the rollback succeeded, false if it failed.

#### errorMessage

    public java.lang.String errorMessage()

If an operation failed and generated an error, the error message is available here. If there is no error then this method returns NULL.

#### errorNumber

    public long errorNumber()

If an operation failed and generated an error, the error number is available here. If there is no error then this method returns 0.

#### debugOn

    public void debugOn()

Causes verbose debugging information to be sent to standard output. Another way to do this is to start a query with "-- debug\n". Yet another way is to set the environment variable SQLR_CLIENT_DEBUG to "ON"

#### debugOff

    public void debugOff()

Turns debugging off.

#### getDebug

    public boolean getDebug()

Returns 0 if debugging is off and 1 if debugging is on.

#### setDebugFile

    public boolean setDebugFile(java.lang.String debugfile)

Allows you to specify a file to write debug to. Setting "filename" to NULL or an empty string causes debug to be written to standard output (the default).

#### setClientInfo

    public boolean setClientInfo(java.lang.String clientinfo)

Allows you to set a string that will be passed to the server and ultimately included in server-side logging along with queries that were run by this instance of the client.

#### getClientInfo

    public java.lang.String getClientInfo()

Returns the string that was set by setClientInfo().