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data_converter.go
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data_converter.go
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// The MIT License
//
// Copyright (c) 2020 Temporal Technologies Inc. All rights reserved.
//
// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package converter
import (
commonpb "go.temporal.io/api/common/v1"
)
type (
// DataConverter is used by the framework to serialize/deserialize input and output of activity/workflow
// that need to be sent over the wire.
// To encode/decode workflow arguments, set DataConverter in client, through client.Options.
// To override DataConverter for specific activity or child workflow use workflow.WithDataConverter to create new Context,
// and pass that context to ExecuteActivity/ExecuteChildWorkflow calls.
// Temporal support using different DataConverters for different activity/childWorkflow in same workflow.
// For advanced data converters that may exceed the deadlock detection timeout
// for a workflow, such as ones making remote calls, use
// workflow.DataConverterWithoutDeadlockDetection.
DataConverter interface {
// ToPayload converts single value to payload.
ToPayload(value interface{}) (*commonpb.Payload, error)
// FromPayload converts single value from payload.
//
// Note, values should not be reused for extraction here because merging on
// top of existing values may result in unexpected behavior similar to
// json.Unmarshal.
FromPayload(payload *commonpb.Payload, valuePtr interface{}) error
// ToPayloads converts a list of values.
ToPayloads(value ...interface{}) (*commonpb.Payloads, error)
// FromPayloads converts to a list of values of different types.
// Useful for deserializing arguments of function invocations.
//
// Note, values should not be reused for extraction here because merging on
// top of existing values may result in unexpected behavior similar to
// json.Unmarshal.
FromPayloads(payloads *commonpb.Payloads, valuePtrs ...interface{}) error
// ToString converts payload object into human readable string.
ToString(input *commonpb.Payload) string
// ToStrings converts payloads object into human readable strings.
ToStrings(input *commonpb.Payloads) []string
}
)