/
feed.go
168 lines (148 loc) · 5.2 KB
/
feed.go
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package keeper
import (
"encoding/hex"
gogotypes "github.com/gogo/protobuf/types"
tmbytes "github.com/tendermint/tendermint/libs/bytes"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/irisnet/irismod/modules/oracle/types"
"github.com/irisnet/irismod/modules/service/exported"
servicetypes "github.com/irisnet/irismod/modules/service/types"
)
// GetFeed returns the feed by the feed name
func (k Keeper) GetFeed(ctx sdk.Context, feedName string) (feed types.Feed, found bool) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.GetFeedKey(feedName))
if bz == nil {
return feed, false
}
k.cdc.MustUnmarshalBinaryBare(bz, &feed)
return feed, true
}
// GetFeedByReqCtxID returns the feed by the request context ID
func (k Keeper) GetFeedByReqCtxID(ctx sdk.Context, requestContextID tmbytes.HexBytes) (feed types.Feed, found bool) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.GetReqCtxIDKey(requestContextID))
var feedName gogotypes.StringValue
k.cdc.MustUnmarshalBinaryBare(bz, &feedName)
return k.GetFeed(ctx, feedName.Value)
}
// IteratorFeeds iterates through all feeds
func (k Keeper) IteratorFeeds(ctx sdk.Context, fn func(feed types.Feed)) {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.GetFeedPrefixKey())
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
var res types.Feed
k.cdc.MustUnmarshalBinaryBare(iterator.Value(), &res)
fn(res)
}
}
// IteratorFeedsByState iterates through all feeds by state
func (k Keeper) IteratorFeedsByState(
ctx sdk.Context,
state servicetypes.RequestContextState,
fn func(feed types.Feed),
) {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.GetFeedStatePrefixKey(state))
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
var feedName gogotypes.StringValue
k.cdc.MustUnmarshalBinaryBare(iterator.Value(), &feedName)
if feed, found := k.GetFeed(ctx, feedName.Value); found {
fn(feed)
}
}
}
// SetFeed saves a feed to store
func (k Keeper) SetFeed(ctx sdk.Context, feed types.Feed) {
store := ctx.KVStore(k.storeKey)
bz := k.cdc.MustMarshalBinaryBare(&feed)
store.Set(types.GetFeedKey(feed.FeedName), bz)
bz = k.cdc.MustMarshalBinaryBare(&gogotypes.StringValue{Value: feed.FeedName})
requestContextID, _ := hex.DecodeString(feed.RequestContextID)
store.Set(types.GetReqCtxIDKey(requestContextID), bz)
}
// SetFeedValue saves a feed result to store
func (k Keeper) SetFeedValue(
ctx sdk.Context,
feedName string,
batchCounter uint64,
latestHistory uint64,
value types.FeedValue,
) {
store := ctx.KVStore(k.storeKey)
counter := k.getFeedValuesCnt(ctx, feedName)
delta := counter - int(latestHistory)
k.deleteOldestFeedValue(ctx, feedName, delta+1)
bz := k.cdc.MustMarshalBinaryBare(&value)
store.Set(types.GetFeedValueKey(feedName, batchCounter), bz)
}
// GetFeedValues returns all feed values by the feed name
func (k Keeper) GetFeedValues(ctx sdk.Context, feedName string) (result types.FeedValues) {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStoreReversePrefixIterator(store, types.GetFeedValuePrefixKey(feedName))
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
var res types.FeedValue
k.cdc.MustUnmarshalBinaryBare(iterator.Value(), &res)
result = append(result, res)
}
return
}
// Enqueue puts the feed name to a 'state' queue
func (k Keeper) Enqueue(ctx sdk.Context, feedName string, state servicetypes.RequestContextState) {
store := ctx.KVStore(k.storeKey)
bz := k.cdc.MustMarshalBinaryBare(&gogotypes.StringValue{Value: feedName})
store.Set(types.GetFeedStateKey(feedName, state), bz)
}
// Dequeue removes the specified feed from the 'state' queue
func (k Keeper) Dequeue(ctx sdk.Context, feedName string, state servicetypes.RequestContextState) {
store := ctx.KVStore(k.storeKey)
store.Delete(types.GetFeedStateKey(feedName, state))
}
// dequeueAndEnqueue moves the specified feed from the 'dequeueState' queue to the 'enqueueState' queue
func (k Keeper) dequeueAndEnqueue(
ctx sdk.Context,
feedName string,
dequeueState servicetypes.RequestContextState,
enqueueState servicetypes.RequestContextState,
) {
store := ctx.KVStore(k.storeKey)
store.Delete(types.GetFeedStateKey(feedName, dequeueState))
bz := k.cdc.MustMarshalBinaryBare(&gogotypes.StringValue{Value: feedName})
store.Set(types.GetFeedStateKey(feedName, enqueueState), bz)
}
func (k Keeper) getFeedValuesCnt(ctx sdk.Context, feedName string) (i int) {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStoreReversePrefixIterator(store, types.GetFeedValuePrefixKey(feedName))
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
i++
}
return
}
func (k Keeper) deleteOldestFeedValue(ctx sdk.Context, feedName string, delta int) {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.GetFeedValuePrefixKey(feedName))
defer iterator.Close()
for i := 1; iterator.Valid() && i <= delta; iterator.Next() {
store.Delete(iterator.Key())
i++
}
}
func (k Keeper) ResetFeedEntryState(ctx sdk.Context) error {
k.IteratorFeedsByState(
ctx,
exported.RUNNING,
func(feed types.Feed) {
k.dequeueAndEnqueue(
ctx,
feed.FeedName,
exported.RUNNING,
exported.PAUSED,
)
},
)
return nil
}