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ADR-038 Part 1: WriteListener, listen.KVStore, MultiStore and KVStore updates #8551

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merged 15 commits into from
Mar 30, 2021

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@i-norden i-norden commented Feb 9, 2021

Description

Hi all 👋 this PR introduces the first stage of changes to support ADR-038 state listening. I've gone ahead and split this ADR implementation up into three segments to hopefully improve the review process. This first segment introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In the next segment I'll introduce the StreamingService interface and an implementation that writes out to files, it's integration and configuration at the BaseApp level, as well as example integration into SimApp.

In the third segment I'll introduce an auxiliary service for consuming those files and serving the data remotely with filtering/search capabilities.

This work is towards satisfying ADR-038


Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

  • Targeted PR against correct branch (see CONTRIBUTING.md)
  • Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
  • Code follows the module structure standards.
  • Wrote unit and integration tests
  • Updated relevant documentation (docs/) or specification (x/<module>/spec/)
  • Added relevant godoc comments.
  • Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
  • Re-reviewed Files changed in the Github PR explorer
  • Review Codecov Report in the comment section below once CI passes

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codecov bot commented Feb 9, 2021

Codecov Report

Merging #8551 (0e5614d) into master (f8f52c6) will increase coverage by 0.09%.
The diff coverage is 84.72%.

Impacted file tree graph

@@            Coverage Diff             @@
##           master    #8551      +/-   ##
==========================================
+ Coverage   58.87%   58.96%   +0.09%     
==========================================
  Files         573      575       +2     
  Lines       32091    32159      +68     
==========================================
+ Hits        18893    18963      +70     
+ Misses      10987    10982       -5     
- Partials     2211     2214       +3     
Impacted Files Coverage Δ
server/mock/store.go 22.44% <0.00%> (-2.00%) ⬇️
store/cachekv/store.go 87.23% <0.00%> (-0.94%) ⬇️
store/prefix/store.go 86.36% <0.00%> (-1.33%) ⬇️
store/types/store.go 60.00% <ø> (ø)
store/types/listening.go 71.42% <71.42%> (ø)
store/listenkv/store.go 96.87% <96.87%> (ø)
store/dbadapter/store.go 100.00% <100.00%> (+8.33%) ⬆️
store/gaskv/store.go 100.00% <100.00%> (ø)
store/iavl/store.go 72.08% <100.00%> (+1.16%) ⬆️
store/mem/store.go 81.81% <100.00%> (+21.81%) ⬆️
... and 8 more

@i-norden i-norden force-pushed the adr038_writelistener branch 3 times, most recently from 0fa9a3d to b4889a3 Compare February 9, 2021 21:48
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Fixing codecov today

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overall lgtm, nice job! Put a couple of questions in the comments

store/cachekv/store.go Outdated Show resolved Hide resolved
store/rootmulti/store.go Outdated Show resolved Hide resolved
}

// OnWrite satisfies the WriteListener interface by writing length-prefixed protobuf encoded StoreKVPairs
func (wl *StoreKVPairWriteListener) OnWrite(storeKey StoreKey, set bool, key []byte, value []byte) {
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The error is silently ignored here. Would it make sense to update the OnWrite interface to add an error? The listener then decides what to do on error.

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Yeah I think that makes sense! OnWrite is only called from within the listen.KvStore, we can return it to be handled there but the methods it is called within (Set and Delete) don't return an error themselves so it can't bubble up any further than that (without changing the existing KVStore interface methods).

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My only hesitation is that there doesn't seem to be much precedent for initializing a KVStore with a logger to log from within that level.

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Ah, I see, so Set and Delete will anyways silently ignore those errors.

Yeah introducing a logger there is a bigger refactor. I still think adding error on OnWrite is useful, but if you think it's superfluous we can remove it too.

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I went ahead and added it to OnWrite! That way we don't have to break the interface if we want to log down the road.

store/types/listening.go Outdated Show resolved Hide resolved
store/rootmulti/store_test.go Outdated Show resolved Hide resolved
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ACK, thanks!

@i-norden i-norden force-pushed the adr038_writelistener branch 2 times, most recently from 9972464 to b320f44 Compare February 25, 2021 21:13
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Thank you for the review @AmauryM!

@i-norden i-norden force-pushed the adr038_writelistener branch 5 times, most recently from d1ab6a6 to eb068b1 Compare March 2, 2021 15:01
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aaronc commented Mar 30, 2021

Is this ready to be merged @i-norden ? Btw no need to force push, you can just merge.

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Hi @aaronc, yeah this is ready to merge! Aye, I've gotten in the (bad?) habit of rebasing and force pushing to align with the base branch but I will start merging instead.

@aaronc aaronc merged commit feed37d into cosmos:master Mar 30, 2021
@i-norden i-norden mentioned this pull request Sep 7, 2021
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mergify bot pushed a commit that referenced this pull request Oct 24, 2021
…entation, and configuration (#8664)

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## Description

<!-- Add a description of the changes that this PR introduces and the files that
are the most critical to review.
-->

Hello 👋 this PR introduces the second stage of changes to support [ADR-038](#8012) state listening. This is rebased on top of the [first segment](#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!



This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes
yihuang pushed a commit to yihuang/cosmos-sdk that referenced this pull request Sep 19, 2022
…entation, and configuration (cosmos#8664)

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<!-- Add a description of the changes that this PR introduces and the files that
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Hello 👋 this PR introduces the second stage of changes to support [ADR-038](cosmos#8012) state listening. This is rebased on top of the [first segment](cosmos#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes
yihuang pushed a commit to yihuang/cosmos-sdk that referenced this pull request Sep 19, 2022
…entation, and configuration (backport cosmos#8664)

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Hello 👋 this PR introduces the second stage of changes to support [ADR-038](cosmos#8012) state listening. This is rebased on top of the [first segment](cosmos#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes
yihuang pushed a commit to yihuang/cosmos-sdk that referenced this pull request Sep 20, 2022
… updates (cosmos#8551)

* StoreKVPair protobuf message definition and generated go types

* store WriteListener

* update MultiStore, CacheWrap, CacheWrapper interfaces

* adjust KVStores to fit new CacheWrapper interface

* new ListenKVStore

* adjust multistores to fit new MultiStore interface and enable wrapping returned KVStores with the new ListenKVStore

* typo fixes in adr

* ListenKV Store test

* update server mock KVStore and MultiStore

* multistore unit test; fix multistore constructor

* update changelog

* fix bug identified in CI

* improve codecov, minor fixes/adjustments

* review fixes

* review updates; flip set to delete in KVStorePair, updated proto-docs from running 'make proto-gen'
yihuang pushed a commit to yihuang/cosmos-sdk that referenced this pull request Sep 20, 2022
…entation, and configuration (cosmos#8664)

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<!-- Add a description of the changes that this PR introduces and the files that
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Hello 👋 this PR introduces the second stage of changes to support [ADR-038](cosmos#8012) state listening. This is rebased on top of the [first segment](cosmos#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes
yihuang pushed a commit to yihuang/cosmos-sdk that referenced this pull request Sep 23, 2022
…entation, and configuration (cosmos#8664)

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Hello 👋 this PR introduces the second stage of changes to support [ADR-038](cosmos#8012) state listening. This is rebased on top of the [first segment](cosmos#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes
tomtau pushed a commit to crypto-org-chain/cosmos-sdk that referenced this pull request Sep 29, 2022
…entation, and configuration (cosmos#8664)

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Hello 👋 this PR introduces the second stage of changes to support [ADR-038](cosmos#8012) state listening. This is rebased on top of the [first segment](cosmos#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes
tac0turtle pushed a commit that referenced this pull request Oct 2, 2022
…entation, and configuration (backport #8664) (#13325)

* feat: ADR-038 Part 2: StreamingService interface, file writing implementation, and configuration (backport #8664)

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Hello 👋 this PR introduces the second stage of changes to support [ADR-038](#8012) state listening. This is rebased on top of the [first segment](#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes

* Update CHANGELOG.md

Co-authored-by: Ian Norden <[email protected]>
tac0turtle pushed a commit that referenced this pull request Oct 3, 2022
…entation, and configuration (#8664) (#13326)

* feat: ADR-038 Part 2: StreamingService interface, file writing implementation, and configuration (#8664)

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Hello 👋 this PR introduces the second stage of changes to support [ADR-038](#8012) state listening. This is rebased on top of the [first segment](#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes

* fix lint

* Update CHANGELOG.md

Co-authored-by: Ian Norden <[email protected]>
MissingNO57 pushed a commit to fetchai/cosmos-sdk that referenced this pull request Oct 17, 2022
…entation, and configuration (#8664) (#13326)

* feat: ADR-038 Part 2: StreamingService interface, file writing implementation, and configuration (#8664)

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Hello 👋 this PR introduces the second stage of changes to support [ADR-038](cosmos/cosmos-sdk#8012) state listening. This is rebased on top of the [first segment](cosmos/cosmos-sdk#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)
dudong2 pushed a commit to dudong2/lbm-sdk that referenced this pull request Nov 3, 2022
…entation, and configuration (#8664) (#13326)

* feat: ADR-038 Part 2: StreamingService interface, file writing implementation, and configuration (#8664)

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v    Before smashing the submit button please review the checkboxes.
v    If a checkbox is n/a - please still include it but + a little note why
☺ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >  -->

<!-- Add a description of the changes that this PR introduces and the files that
are the most critical to review.
-->

Hello 👋 this PR introduces the second stage of changes to support [ADR-038](cosmos/cosmos-sdk#8012) state listening. This is rebased on top of the [first segment](cosmos/cosmos-sdk#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes

* fix lint

* Update CHANGELOG.md

Co-authored-by: Ian Norden <[email protected]>
JeancarloBarrios pushed a commit to agoric-labs/cosmos-sdk that referenced this pull request Sep 28, 2024
…entation, and configuration (cosmos#8664) (cosmos#13326)

* feat: ADR-038 Part 2: StreamingService interface, file writing implementation, and configuration (cosmos#8664)

<!-- < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < ☺
v                               ✰  Thanks for creating a PR! ✰
v    Before smashing the submit button please review the checkboxes.
v    If a checkbox is n/a - please still include it but + a little note why
☺ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >  -->

<!-- Add a description of the changes that this PR introduces and the files that
are the most critical to review.
-->

Hello 👋 this PR introduces the second stage of changes to support [ADR-038](cosmos#8012) state listening. This is rebased on top of the [first segment](cosmos#8551), which introduces the low level changes to the MultiStore and KVStore interfaces and implementations, the new WriteListener types, and the new listen.KVStore type.

In this segment we introduce the StreamingService interface, an implementation that writes out to files, and it's integration and configuration at the BaseApp level.

The idea was to have the first segment reviewed independently first but if people think it is easier/more time efficient to review both at the same time then we could start here.

Thanks!

This work is towards satisfying [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-038-state-listening.md)

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [x] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [x] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [x] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [x] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [x] Re-reviewed `Files changed` in the Github PR explorer
- [x] Review `Codecov Report` in the comment section below once CI passes

* fix lint

* Update CHANGELOG.md

Co-authored-by: Ian Norden <[email protected]>
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