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new HTTPClient interface for subscriptions

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This commit is contained in:
Anton Kaliaev
2019-02-07 18:53:59 +04:00
parent 0cddfdc81d
commit 3966988bcc
4 changed files with 100 additions and 83 deletions
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45
rpc/client/localclient.go
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@ -3,8 +3,10 @@ package client
import (
"context"
"github.com/pkg/errors"
cmn "github.com/tendermint/tendermint/libs/common"
tmpubsub "github.com/tendermint/tendermint/libs/pubsub"
tmquery "github.com/tendermint/tendermint/libs/pubsub/query"
nm "github.com/tendermint/tendermint/node"
"github.com/tendermint/tendermint/rpc/core"
ctypes "github.com/tendermint/tendermint/rpc/core/types"
@ -140,14 +142,47 @@ func (Local) TxSearch(query string, prove bool, page, perPage int) (*ctypes.Resu
return core.TxSearch(query, prove, page, perPage)
}
func (c *Local) Subscribe(ctx context.Context, subscriber string, query tmpubsub.Query, outCapacity ...int) (types.Subscription, error) {
return c.EventBus.Subscribe(ctx, subscriber, query, outCapacity...)
// Subscribe implements EventsClient by using local eventBus to subscribe given
// subscriber to query.
func (c *Local) Subscribe(ctx context.Context, subscriber, query string, callback EventCallback) error {
q, err := tmquery.New(query)
if err != nil {
return errors.Wrap(err, "failed to parse query")
}
sub, err := c.EventBus.Subscribe(ctx, subscriber, q)
if err != nil {
return errors.Wrap(err, "failed to subscribe")
}
go func() {
for {
select {
case msg := <-sub.Out():
// can panic
callback(&ctypes.ResultEvent{Query: query, Data: msg.Data(), Tags: msg.Tags()}, nil)
case <-sub.Cancelled():
// can panic
callback(nil, sub.Err())
return
}
}
}()
return nil
}
func (c *Local) Unsubscribe(ctx context.Context, subscriber string, query tmpubsub.Query) error {
return c.EventBus.Unsubscribe(ctx, subscriber, query)
// Unsubscribe implements EventsClient by using local eventBus to unsubscribe
// given subscriber from query.
func (c *Local) Unsubscribe(ctx context.Context, subscriber, query string) error {
q, err := tmquery.New(query)
if err != nil {
return errors.Wrap(err, "failed to parse query")
}
return c.EventBus.Unsubscribe(ctx, subscriber, q)
}
// UnsubscribeAll implements EventsClient by using local eventBus to
// unsubscribe given subscriber from all queries.
func (c *Local) UnsubscribeAll(ctx context.Context, subscriber string) error {
return c.EventBus.UnsubscribeAll(ctx, subscriber)
}