This is a wrapper for HikariCP which is a database connection pool manager (https://github.com/brettwooldridge/HikariCP)
From the github page; Fast, simple, reliable. HikariCP is a "zero-overhead" production ready JDBC connection pool. At roughly 130Kb, the library is very light.
A user called "mindful" had previously wrapped this library but he hasnt been on the forum since March 2021 - see here - and his wrapper was for an older version.
A while back I wrote a semi-functional wrapper for HikariCP 5.x for some testing I was doing so I thought I should mention it here.
DOWNLOAD LINK;
Library code; https://github.com/ope-nz/HikariCP
To create a connection pool (in this case is for SQLite)
To use the connection pool (eg in a handler class);
You can adjust some settings directly via the library eg
To get stats use these methods below. Note that calling these methods before requesting a connection results in a null exception so the library will return -1 to avoid any errors.
Note: There are many config options and I have only implemented the ones I needed. If there is enough interest I can implement more or you can simply use JavaObject to change the config as per mindfuls post.
Config documentation; https://github.com/brettwooldridge/HikariCP#gear-configuration-knobs-baby
If you wish to create a read only connection to a SQLite database you need to initialize this way. The connection is faster as a result.
From the github page; Fast, simple, reliable. HikariCP is a "zero-overhead" production ready JDBC connection pool. At roughly 130Kb, the library is very light.
A user called "mindful" had previously wrapped this library but he hasnt been on the forum since March 2021 - see here - and his wrapper was for an older version.
A while back I wrote a semi-functional wrapper for HikariCP 5.x for some testing I was doing so I thought I should mention it here.
DOWNLOAD LINK;
Library code; https://github.com/ope-nz/HikariCP
To create a connection pool (in this case is for SQLite)
B4X:
Dim url As String = $"jdbc:sqlite:${File.DirApp}\test.db"$
'Initialize(String JdbcUrl, String user, String password, String ConnectionTestQuery)
cp.Initialize(url,Null,Null,Null)To use the connection pool (eg in a handler class);
B4X:
'Handler class
Sub Class_Globals
Dim DB As SQL
End Sub
Public Sub Initialize
Dim DB As SQL
DB = Main.cp.GetConnection
'Use DB as per normal SQL connection
' Close the connecton to return to the pool, otherwise another connection will created until this one is deemed idle
DB.Close
End SubYou can adjust some settings directly via the library eg
B4X:
cp.MaximumPoolSize = 100
cp.MaxLifetime = 1000
cp.MinimumIdle = 1000
Log(cp.MaximumPoolSize)
Log(cp.MaxLifetime)
Log(cp.MinimumIdle)To get stats use these methods below. Note that calling these methods before requesting a connection results in a null exception so the library will return -1 to avoid any errors.
B4X:
Log(cp.ActiveConnections)
Log(cp.IdleConnections)
Log(cp.ThreadsAwaitingConnection)
Log(cp.TotalConnections)Note: There are many config options and I have only implemented the ones I needed. If there is enough interest I can implement more or you can simply use JavaObject to change the config as per mindfuls post.
Config documentation; https://github.com/brettwooldridge/HikariCP#gear-configuration-knobs-baby
If you wish to create a read only connection to a SQLite database you need to initialize this way. The connection is faster as a result.
B4X:
Dim url As String = $"jdbc:sqlite:${File.DirApp}\db.sqlite?open_mode=1"$
cp.Initialize(url,Null,Null,Null)
Log(cp.IsInitialised)
cp.MaximumPoolSize = 50
cp.MinimumIdle = 10
cp.ReadOnly = True
cp.AutoCommit = False
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