Package io.narayana.db

Class Allocator

java.lang.Object

io.narayana.db.Allocator

Direct Known Subclasses:

CIPostgreAllocator, DBAllocator, ExternalDBAllocator, H2Allocator, PostgreContainerAllocator

public abstract class Allocator
extends Object

Start databases according to the profile. The goal is to be able to work both with platform independent simple H2 example, locally started databases in containers, e.g. Postgres, and with remote databases configured via REST API, e.g. MS SQL, Oracle, Maria and more.

Author:

Michal Karm Babacek

Constructor Summary

Constructors

Constructor	Description
Allocator()

Method Summary

Modifier and Type	Method	Description
abstract DB	allocateDB()
abstract DB	allocateDB(int expiryMinutes)
abstract boolean	cleanDB(DB db)
abstract boolean	deallocateDB(DB db)
static boolean	executeTestStatement(DB db, String pathToDriverJar)	Loads proper driver dynamically.
static Allocator	getInstance()
static String	getProp(String prop)
abstract boolean	reallocateDB(int expiryMinutes, DB db)
abstract boolean	reallocateDB(DB db)

Methods inherited from class java.lang.Object

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

Constructor Details

Allocator

public Allocator()

Method Details

getInstance

public static Allocator getInstance()
                             throws IOException

Throws:

IOException

allocateDB

public abstract DB allocateDB(int expiryMinutes)

allocateDB

public abstract DB allocateDB()

deallocateDB

public abstract boolean deallocateDB(DB db)

reallocateDB

public abstract boolean reallocateDB(int expiryMinutes,
 DB db)

reallocateDB

public abstract boolean reallocateDB(DB db)

cleanDB

public abstract boolean cleanDB(DB db)

executeTestStatement

public static boolean executeTestStatement(DB db,
 String pathToDriverJar)
                                    throws ClassNotFoundException,
MalformedURLException,
IllegalAccessException,
InstantiationException,
SQLException

Loads proper driver dynamically. Credit: http://www.kfu.com/%7Ensayer/Java/dyn-jdbc.html

Executes a simple SELECT 1 statement to verify the DB actually does something.

Parameters:

db - , used as: dbUrl JDBC connection URL user DB user pass DB password driverClass e.g. org.postgresql.Driver pathToDriverJar Either a downloaded driver jar or a one from ShrinkWrap Maven resolver overallTimeoutMs How long do we keep trying with 1000ms pause in between

Returns:

true on success

Throws:

ClassNotFoundException - Fix the driver class name

MalformedURLException - Fix the driver jar path

IllegalAccessException

InstantiationException

SQLException

getProp

public static String getProp(String prop)