Package dev.langchain4j.community.store.embedding.cloudsql

Class PostgresEngine

java.lang.Object

dev.langchain4j.community.store.embedding.cloudsql.PostgresEngine

public class PostgresEngine
extends Object

PostgresEngine

Instances of this store are created by configuring a builder: PostgresEngine engine = new PostgresEngine.Builder(projectId, region, instance, database).build(); Uses HikariCP as a DataSource. A connection pool that will avoid the latency of repeatedly creating new database connections.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PostgresEngine.Builder	Builder which configures and creates instances of PostgresEngine.

Constructor Summary

Constructors

Constructor	Description
PostgresEngine(PostgresEngine.Builder builder)	Constructor for PostgresEngine

Method Summary

Modifier and Type	Method	Description
void	close()	Closes a Connection
Connection	getConnection()	Gets a Connection from the datasource
void	initVectorStoreTable(EmbeddingStoreConfig embeddingStoreConfig)

Methods inherited from class java.lang.Object

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

Constructor Details

PostgresEngine

public PostgresEngine(PostgresEngine.Builder builder)

Constructor for PostgresEngine

Parameters:

builder - builder.

Method Details

getConnection

public Connection getConnection()
                         throws SQLException

Gets a Connection from the datasource

Returns:

A connection with the database specified in PostgresEngine

Throws:

SQLException - if database error occurs

initVectorStoreTable

public void initVectorStoreTable(EmbeddingStoreConfig embeddingStoreConfig)

Parameters:

embeddingStoreConfig - contains the parameters necesary to intialize the Vector table

close

public void close()

Closes a Connection