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Session: Opening a Session

To open session use the openSession method from DocumentStore.

Syntax

There are three overloads of openSession methods

// Open session for a 'default' database configured in 'DocumentStore'
IDocumentSession openSession();

// Open session for a specified database
IDocumentSession openSession(String database);

IDocumentSession openSession(SessionOptions sessionOptions);

The first method is an equivalent of doing

store.openSession(new SessionOptions());

The second method is an equivalent of doing

SessionOptions sessionOptions = new SessionOptions();
sessionOptions.setDatabase(databaseName);
store.openSession(sessionOptions);

Parameters
options OpenSessionOptions Options containing information such as name of database and RequestExecutor.
Return Value
IDocumentSession Instance of a session object.

Options

private String database;
private boolean noTracking;
private boolean noCaching;
private RequestExecutor requestExecutor;
private TransactionMode transactionMode;

// getters and setters

Options
database String Name of database that session should operate on. If null then default database set in DocumentStore is used.
noTracking boolean Indicates if session should not keep track of the changes. Default: false. More here.
noCaching boolean Indicates if session should not cache responses. Default: false. More here.
requestExecutor RequestExecutor (Advanced) Request executor to use. If null default one will be used.
transactionMode TransactionMode Sets the mode for the session. By default it is set to SINGLE_NODE, but session can also operate 'CLUSTER_WIDE'. You can read more about Cluster-Wide Transactions here.

Example I

try (IDocumentSession session = store.openSession()) {
    // code here
}

Example II - Disabling Entities Tracking

SessionOptions sessionOptions = new SessionOptions();
sessionOptions.setNoTracking(true);
try (IDocumentSession session = store.openSession()) {
    Employee employee1 = session.load(Employee.class, "employees/1-A");
    Employee employee2 = session.load(Employee.class, "employees/1-A");

    // because NoTracking is set to 'true'
    // each load will create a new Employee instance
    Assert.assertNotSame(employee1, employee2);
}

Remarks

Important

Always remember to release session allocated resources after usage by invoking the close method or wrapping the session object in the try statement.