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pRPC: gRPC on Classic AppEngine today

gRPC is great, but is not available on Classic AppEngine at this time, so while working on the [nextgen CI for Chromium][luci] we wrote pRPC (provisional RPC) for Go that is compatible with gRPC server/client code, but works on HTTP 1.x and Classic AppEngine. In addition it has gRPC-compatible discovery and a CLI tool.

IDL

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import java.util.*;
public class BellmanFord
{
    public static long dist[];
    public static long prev[];
    public static LinkedList<DirectedEdge> edgesList = new LinkedList<DirectedEdge>();
    
    public static class DirectedEdge{
        protected int v; 
        protected int w; // edge

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# retrieves commit relative date and message
humanify() {
  while read hash; do
    # echo to trim the new line
    echo $( git log -n 1 ..$hash --format='%ci : %h : %s%n%b' )
  done
}

# show the commits!
git fsck --unreachable | grep -oP '(?<=commit )\w+' | humanify | sort

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id: 8919157845550588816
builder {
  project: "chrome"
  bucket: "try"
  builder: "Linux Builder Perf"
}
number: 480
created_by: "user:martiniss@google.com"
create_time {
  seconds: 1552425260

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{
  "name": "bb-${build_id}-${project}-${builder}",
  "priority": "30",
  "tags": [
    "log_location:logdog://logs.chromium.org/${project}/buildbucket/${hostname}/${build_id}/+/annotations",
    "luci_project:${project}"
  ],
  "pool_task_template": "SKIP",
  "task_slices": [
    {

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initResin gr-app.js:859:403
Unexpected plugin analytics installed from preloaded:analytics. gr-app.js:1656:42
Unexpected plugin buildbucket installed from preloaded:buildbucket. gr-app.js:1656:42
Unexpected plugin chromium-behavior installed from preloaded:chromium-behavior. gr-app.js:1656:42
Unexpected plugin chromium-coverage installed from preloaded:chromium-coverage. gr-app.js:1656:42
Unexpected plugin chromium-style installed from preloaded:chromium-style. gr-app.js:1656:42
Unexpected plugin chumpdetector installed from preloaded:chumpdetector. gr-app.js:1656:42
Unexpected plugin clearcut installed from preloaded:clearcut. gr-app.js:1656:42
Unexpected plugin codemirror_editor installed from preloaded:codemirror_editor. gr-app.js:1656:42
Unexpected plugin commitqueue installed from preloaded:commitqueue. gr-app.js:1656:42

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<gr-overlay id="tryJobsPicker" with-backdrop="" no-cancel-on-outside-click="" class="style-scope cr-buildbucket-view x-scope gr-overlay-0" tabindex="-1" style="outline: none; position: fixed; top: 0px; left: 577.867px; box-sizing: border-box; max-height: 308px; max-width: 1618px; z-index: 103;">
    
    
      <cr-tryjob-picker autofocus="" tabindex="-1" class="style-scope cr-buildbucket-view">
    
    <header class="style-scope cr-tryjob-picker">
      <h3 class="style-scope cr-tryjob-picker">Choose tryjobs</h3>
    </header>
    <main class="style-scope cr-tryjob-picker">
      <input autofocus="" is="iron-input" type="text" placeholder="Regex filter" class="filter  style-scope cr-tryjob-picker">

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[cr go] proto $ (bqsu-addmissing)  bqschemaupdater -message "buildbucket.v2.Build" -table "cr-buildbucket-dev.builds.completed_BETA"
Updating table "cr-buildbucket-dev.builds.completed_BETA"
The following changes to the schema will be made:
================================================================================
--- Current
+++ New
@@ -126,8 +126,7 @@

        // Gerrit patchsets to run against.
        // Usually present in tryjobs, set by CQ, Gerrit, git-cl-try.

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[cr go] proto $ (completed_builds)  bqschemaupdater -message buildbucket.events.BuildCompleted -table cr-buildbucket-dev.experimental.completed_builds
Updating table "cr-buildbucket-dev.experimental.completed_builds"
The following changes to the schema will be made.
================================================================================
--- Current
+++ New
@@ -76,6 +76,9 @@
        repeated STRING tags

        INTEGER x

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// Time of the event creation.
TIMESTAMP create_time

// The state of the build at the completion time.
RECORD build {
	INTEGER x

	// Buildbucket build id.
	INTEGER id