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client.go
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client.go
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// Copyright 2019-present Open Networking Foundation.
//
// 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 gossip
import (
"github.com/atomix/atomix-api/go/atomix/primitive"
"github.com/atomix/atomix-api/go/atomix/primitive/meta"
"github.com/atomix/atomix-go-framework/pkg/atomix/cluster"
"github.com/atomix/atomix-go-framework/pkg/atomix/time"
"github.com/atomix/atomix-go-framework/pkg/atomix/util"
"github.com/atomix/atomix-go-framework/pkg/atomix/util/async"
)
// NewClient creates a new proxy client
func NewClient(cluster cluster.Cluster, scheme time.Scheme) *Client {
partitions := cluster.Partitions()
proxyPartitions := make([]*Partition, 0, len(partitions))
proxyPartitionsByID := make(map[PartitionID]*Partition)
clock := scheme.NewClock()
for _, partition := range partitions {
proxyPartition := NewPartition(cluster, partition, clock)
proxyPartitions = append(proxyPartitions, proxyPartition)
proxyPartitionsByID[proxyPartition.ID] = proxyPartition
}
return &Client{
Cluster: cluster,
clock: clock,
partitions: proxyPartitions,
partitionsByID: proxyPartitionsByID,
}
}
// Client is a client for communicating with the storage layer
type Client struct {
Cluster cluster.Cluster
clock time.Clock
partitions []*Partition
partitionsByID map[PartitionID]*Partition
}
func (c *Client) addTimestamp(timestamp *meta.Timestamp) *meta.Timestamp {
var t time.Timestamp
if timestamp != nil {
t = c.clock.Update(time.NewTimestamp(*timestamp))
} else {
t = c.clock.Increment()
}
proto := c.clock.Scheme().Codec().EncodeTimestamp(t)
return &proto
}
func (c *Client) AddResponseHeaders(headers *primitive.ResponseHeaders) {
headers.Timestamp = c.addTimestamp(headers.Timestamp)
}
func (c *Client) Partition(partitionID PartitionID) *Partition {
return c.partitionsByID[partitionID]
}
func (c *Client) PartitionBy(partitionKey []byte) *Partition {
i, err := util.GetPartitionIndex(partitionKey, len(c.partitions))
if err != nil {
panic(err)
}
return c.partitions[i]
}
func (c *Client) Partitions() []*Partition {
return c.partitions
}
func (c *Client) Close() error {
return async.IterAsync(len(c.partitions), func(i int) error {
return c.partitions[i].Close()
})
}