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session.go
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session.go
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// Copyright (c) 2019 The Jaeger Authors.
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cassandra
// Consistency is Cassandra's consistency level for queries.
type Consistency uint16
const (
// Any ...
Any Consistency = 0x00
// One ...
One Consistency = 0x01
// Two ...
Two Consistency = 0x02
// Three ...
Three Consistency = 0x03
// Quorum ...
Quorum Consistency = 0x04
// All ...
All Consistency = 0x05
// LocalQuorum ...
LocalQuorum Consistency = 0x06
// EachQuorum ...
EachQuorum Consistency = 0x07
// LocalOne ...
LocalOne Consistency = 0x0A
)
// Session is an abstraction of gocql.Session
type Session interface {
Query(stmt string, values ...interface{}) Query
Close()
}
// UpdateQuery is a subset of Query just for updates
type UpdateQuery interface {
Exec() error
String() string
// ScanCAS executes a lightweight transaction (i.e. an UPDATE or INSERT
// statement containing an IF clause). If the transaction fails because
// the existing values did not match, the previous values will be stored
// in dest.
ScanCAS(dest ...interface{}) (bool, error)
}
// Query is an abstraction of gocql.Query
type Query interface {
UpdateQuery
Iter() Iterator
Bind(v ...interface{}) Query
Consistency(level Consistency) Query
PageSize(int) Query
}
// Iterator is an abstraction of gocql.Iter
type Iterator interface {
Scan(dest ...interface{}) bool
Close() error
}