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policy.go
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policy.go
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// Copyright 2013-2017 Aerospike, 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 aerospike
import (
"time"
)
// Policy Interface
type Policy interface {
// Retrieves BasePolicy
GetBasePolicy() *BasePolicy
}
// BasePolicy encapsulates parameters for transaction policy attributes
// used in all database operation calls.
type BasePolicy struct {
Policy
// Priority of request relative to other transactions.
// Currently, only used for scans.
Priority Priority //= Priority.DEFAULT;
// How replicas should be consulted in a read operation to provide the desired
// consistency guarantee. Default to allowing one replica to be used in the
// read operation.
ConsistencyLevel ConsistencyLevel //= CONSISTENCY_ONE
// Timeout specifies transaction timeout.
// This timeout is used to set the socket timeout and is also sent to the
// server along with the transaction in the wire protocol.
// Default to no timeout (0).
Timeout time.Duration
// MaxRetries determines maximum number of retries before aborting the current transaction.
// A retry is attempted when there is a network error other than timeout.
// If maxRetries is exceeded, the abort will occur even if the timeout
// has not yet been exceeded.
MaxRetries int //= 2;
// SleepBetweenReplies determines duration to sleep between retries if a transaction fails and the
// timeout was not exceeded. Enter zero to skip sleep.
SleepBetweenRetries time.Duration //= 1ms;
// ReplicaPolicy detemines the node to the send the read commands containing the key's partition replica type.
// Write commands are not affected by this setting, because all writes are directed
// to the node containing the key's master partition.
// Default to sending read commands to the node containing the key's master partition.
ReplicaPolicy ReplicaPolicy
}
// NewPolicy generates a new BasePolicy instance with default values.
func NewPolicy() *BasePolicy {
return &BasePolicy{
Priority: DEFAULT,
ConsistencyLevel: CONSISTENCY_ONE,
Timeout: 0 * time.Millisecond,
MaxRetries: 2,
SleepBetweenRetries: 1 * time.Millisecond,
ReplicaPolicy: MASTER,
}
}
var _ Policy = &BasePolicy{}
// GetBasePolicy returns embedded BasePolicy in all types that embed this struct.
func (p *BasePolicy) GetBasePolicy() *BasePolicy { return p }