mongodb

Documentation

Overview

Package mongodb is an implementation of StateStore interface to perform operations on store

Index

• func NewMongoDB(logger logger.Logger) state.Store
• type Item
• type MongoDB
  • func (m *MongoDB) BulkDelete(ctx context.Context, req []state.DeleteRequest) error
  • func (m *MongoDB) BulkGet(ctx context.Context, req []state.GetRequest, _ state.BulkGetOpts) ([]state.BulkGetResponse, error)
  • func (m *MongoDB) BulkSet(ctx context.Context, req []state.SetRequest) error
  • func (m *MongoDB) Delete(ctx context.Context, req *state.DeleteRequest) error
  • func (m *MongoDB) Features() []state.Feature
  • func (m *MongoDB) Get(ctx context.Context, req *state.GetRequest) (*state.GetResponse, error)
  • func (m *MongoDB) GetComponentMetadata() map[string]string
  • func (m *MongoDB) Init(ctx context.Context, metadata state.Metadata) (err error)
  • func (m *MongoDB) Multi(ctx context.Context, request *state.TransactionalStateRequest) error
  • func (m *MongoDB) Ping(ctx context.Context) error
  • func (m *MongoDB) Query(ctx context.Context, req *state.QueryRequest) (*state.QueryResponse, error)
  • func (m *MongoDB) Set(ctx context.Context, req *state.SetRequest) error
• type Query
  • func (q *Query) Finalize(filters string, qq *query.Query) error
  • func (q *Query) VisitAND(f *query.AND) (string, error)
  • func (q *Query) VisitEQ(f *query.EQ) (string, error)
  • func (q *Query) VisitIN(f *query.IN) (string, error)
  • func (q *Query) VisitOR(f *query.OR) (string, error)

Functions

func NewMongoDB

func NewMongoDB(logger logger.Logger) state.Store

NewMongoDB returns a new MongoDB state store.

Types

type Item

type Item struct {
	Key   string      `bson:"_id"`
	Value interface{} `bson:"value"`
	Etag  string      `bson:"_etag"`
}

Item is Mongodb document wrapper.

type MongoDB

type MongoDB struct {
	// contains filtered or unexported fields
}

MongoDB is a state store implementation for MongoDB.

func (*MongoDB) BulkDelete

func (m *MongoDB) BulkDelete(ctx context.Context, req []state.DeleteRequest) error

BulkDelete performs a bulk delete operation. We need to implement a custom BulkSet/BulkDelete because with MongoDB transactions are not always available (only when connecting to a replica set), and when they're not, we need to fall back to performing operations in sequence.

func (*MongoDB) BulkGet

func (m *MongoDB) BulkGet(ctx context.Context, req []state.GetRequest, _ state.BulkGetOpts) ([]state.BulkGetResponse, error)

func (*MongoDB) BulkSet

func (m *MongoDB) BulkSet(ctx context.Context, req []state.SetRequest) error

BulkSet performs a bulk save operation. We need to implement a custom BulkSet/BulkDelete because with MongoDB transactions are not always available (only when connecting to a replica set), and when they're not, we need to fall back to performing operations in sequence.

func (*MongoDB) Delete

func (m *MongoDB) Delete(ctx context.Context, req *state.DeleteRequest) error

Delete performs a delete operation.

func (*MongoDB) Features

func (m *MongoDB) Features() []state.Feature

Features returns the features available in this state store.

func (*MongoDB) Get

func (m *MongoDB) Get(ctx context.Context, req *state.GetRequest) (*state.GetResponse, error)

Get retrieves state from MongoDB with a key.

func (*MongoDB) GetComponentMetadata

func (m *MongoDB) GetComponentMetadata() map[string]string

func (*MongoDB) Init

func (m *MongoDB) Init(ctx context.Context, metadata state.Metadata) (err error)

Init establishes connection to the store based on the metadata.

func (*MongoDB) Multi

func (m *MongoDB) Multi(ctx context.Context, request *state.TransactionalStateRequest) error

Multi performs a transactional operation. succeeds only if all operations succeed, and fails if one or more operations fail.

func (*MongoDB) Ping

func (m *MongoDB) Ping(ctx context.Context) error

func (*MongoDB) Query

func (m *MongoDB) Query(ctx context.Context, req *state.QueryRequest) (*state.QueryResponse, error)

Query executes a query against store.

func (*MongoDB) Set

func (m *MongoDB) Set(ctx context.Context, req *state.SetRequest) error

Set saves state into MongoDB.

type Query

type Query struct {
	// contains filtered or unexported fields
}

func (*Query) Finalize

func (q *Query) Finalize(filters string, qq *query.Query) error

func (*Query) VisitAND

func (q *Query) VisitAND(f *query.AND) (string, error)

func (*Query) VisitEQ

func (q *Query) VisitEQ(f *query.EQ) (string, error)

func (*Query) VisitIN

func (q *Query) VisitIN(f *query.IN) (string, error)

func (*Query) VisitOR

func (q *Query) VisitOR(f *query.OR) (string, error)