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From abe...@apache.org
Subject [incubator-zipkin-website] branch asf-site updated: Automatic site generation from 7f83148
Date Thu, 06 Jun 2019 08:52:43 GMT
This is an automated email from the ASF dual-hosted git repository.

abesto pushed a commit to branch asf-site
in repository https://gitbox.apache.org/repos/asf/incubator-zipkin-website.git


The following commit(s) were added to refs/heads/asf-site by this push:
     new b633d32  Automatic site generation from 7f83148
b633d32 is described below

commit b633d32e56d5f909e3baa2ee4a7a0c4babbd2427
Author: jenkins <builds@apache.org>
AuthorDate: Thu Jun 6 08:52:35 2019 +0000

    Automatic site generation from 7f83148
---
 Jenkinsfile             |   3 +-
 pages/downloads.html    |  28 +++---
 zipkin-api/DISCLAIMER   |   5 +
 zipkin-api/Jenkinsfile  |  78 ++++++++++++++++
 zipkin-api/LICENSE      | 201 ++++++++++++++++++++++++++++++++++++++++
 zipkin-api/NOTICE       |   5 +
 zipkin-api/zipkin.proto | 237 ++++++++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 542 insertions(+), 15 deletions(-)

diff --git a/Jenkinsfile b/Jenkinsfile
index 1f7097e..0b7452d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -99,6 +99,7 @@ pipeline {
 				ls "${builddir}/_site/"
 
 				git fetch origin asf-site:asf-site
+				git rm -rf ./zipkin-api
 				git reset --hard
 				git checkout asf-site
 				git log -3
@@ -106,7 +107,7 @@ pipeline {
 				git status
 				cp ./zipkin-api-source/*.yaml ./zipkin-api/
 				git add ./zipkin-api/*.yaml
-				git commit -am"Zipkin OpenApi definitions"
+				git commit -am "Zipkin OpenApi definitions" || true
 
 				rsync -avrh --delete --exclude=".git" --exclude=".gitmodules" --exclude="zipkin-api-source"
--exclude='zipkin-api/*.yaml' "${builddir}/_site/" ./
 				git status
diff --git a/pages/downloads.html b/pages/downloads.html
index b656de7..8bd2c1e 100644
--- a/pages/downloads.html
+++ b/pages/downloads.html
@@ -151,43 +151,43 @@
       <td style="text-align: left">Zipkin Api</td>
       <td style="text-align: left"><a href="https://github.com/apache/incubator-zipkin-api/releases/tag/v0.2.1">0.2.1</a></td>
       <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-api/0.2.1/apache-zipkin-api-incubating-0.2.1-source-release.zip">zip</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-api/0.2.1/apache-zipkin-api-incubating-0.2.1-source-release.zip.asc">asc</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-api/0.2.1/apache-zipkin-api-incubating-0.2.1-source-release.zip.sha512">sha512</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin-api/0.2.1/apache-zipkin-api-incubating-0.2.1-source-release.zip.asc">asc</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin-api/0.2.1/apache-zipkin-api-incubating-0.2.1-source-release.zip.sha512">sha512</a></td>
     </tr>
     <tr>
       <td style="text-align: left">Zipkin Brave for Apache Cassandra</td>
       <td style="text-align: left"><a href="https://github.com/apache/incubator-zipkin-brave-cassandra/releases/tag/v0.10.2">0.10.2</a></td>
       <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/brave-cassandra/0.10.2/apache-zipkin-brave-cassandra-incubating-0.10.2-source-release.zip">zip</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/brave-cassandra/0.10.2/apache-zipkin-brave-cassandra-incubating-0.10.2-source-release.zip.asc">asc</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/brave-cassandra/0.10.2/apache-zipkin-brave-cassandra-incubating-0.10.2-source-release.zip.sha512">sha512</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/brave-cassandra/0.10.2/apache-zipkin-brave-cassandra-incubating-0.10.2-source-release.zip.asc">asc</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/brave-cassandra/0.10.2/apache-zipkin-brave-cassandra-incubating-0.10.2-source-release.zip.sha512">sha512</a></td>
     </tr>
     <tr>
       <td style="text-align: left">Zipkin Brave for Apache Karaf</td>
       <td style="text-align: left"><a href="https://github.com/apache/incubator-zipkin-brave-karaf/releases/tag/v0.1.2">0.1.2</a></td>
       <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/brave-karaf/0.1.2/apache-zipkin-brave-karaf-incubating-0.1.2-source-release.zip">zip</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/brave-karaf/0.1.2/apache-zipkin-brave-karaf-incubating-0.1.2-source-release.zip.asc">asc</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/brave-karaf/0.1.2/apache-zipkin-brave-karaf-incubating-0.1.2-source-release.zip.sha512">sha512</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/brave-karaf/0.1.2/apache-zipkin-brave-karaf-incubating-0.1.2-source-release.zip.asc">asc</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/brave-karaf/0.1.2/apache-zipkin-brave-karaf-incubating-0.1.2-source-release.zip.sha512">sha512</a></td>
     </tr>
     <tr>
       <td style="text-align: left">Zipkin Dependencies</td>
       <td style="text-align: left"><a href="https://github.com/apache/incubator-zipkin-dependencies/releases/tag/v2.2.0">2.2.0</a></td>
       <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-dependencies/2.2.0/apache-zipkin-dependencies-incubating-2.2.0-source-release.zip">zip</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-dependencies/2.2.0/apache-zipkin-dependencies-incubating-2.2.0-source-release.zip.asc">asc</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-dependencies/2.2.0/apache-zipkin-dependencies-incubating-2.2.0-source-release.zip.sha512">sha512</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin-dependencies/2.2.0/apache-zipkin-dependencies-incubating-2.2.0-source-release.zip.asc">asc</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin-dependencies/2.2.0/apache-zipkin-dependencies-incubating-2.2.0-source-release.zip.sha512">sha512</a></td>
     </tr>
     <tr>
       <td style="text-align: left">Zipkin Reporter Java</td>
       <td style="text-align: left"><a href="https://github.com/apache/incubator-zipkin-reporter-java/releases/tag/v2.8.3">2.8.3</a></td>
       <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-reporter-java/2.8.3/apache-zipkin-reporter-java-incubating-2.8.3-source-release.zip">zip</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-reporter-java/2.8.3/apache-zipkin-reporter-java-incubating-2.8.3-source-release.zip.asc">asc</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-reporter-java/2.8.3/apache-zipkin-reporter-java-incubating-2.8.3-source-release.zip.sha512">sha512</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin-reporter-java/2.8.3/apache-zipkin-reporter-java-incubating-2.8.3-source-release.zip.asc">asc</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin-reporter-java/2.8.3/apache-zipkin-reporter-java-incubating-2.8.3-source-release.zip.sha512">sha512</a></td>
     </tr>
     <tr>
       <td style="text-align: left">Zipkin Server and Core Library</td>
       <td style="text-align: left"><a href="https://github.com/apache/incubator-zipkin/releases/tag/v2.14.0">2.14.0</a></td>
       <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin/2.14.0/apache-zipkin-incubating-2.14.0-source-release.zip">zip</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin/2.14.0/apache-zipkin-incubating-2.14.0-source-release.zip.asc">asc</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin/2.14.0/apache-zipkin-incubating-2.14.0-source-release.zip.sha512">sha512</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin/2.14.0/apache-zipkin-incubating-2.14.0-source-release.zip.asc">asc</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin/2.14.0/apache-zipkin-incubating-2.14.0-source-release.zip.sha512">sha512</a></td>
     </tr>
   </tbody>
 </table>
@@ -210,8 +210,8 @@
       <td style="text-align: left">Zipkin Layout Factory</td>
       <td style="text-align: left"><a href="https://github.com/apache/incubator-zipkin-layout-factory/releases/tag/v0.0.5">0.0.5</a></td>
       <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-layout-factory/0.0.5/apache-zipkin-layout-factory-incubating-0.0.5-source-release.zip">zip</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-layout-factory/0.0.5/apache-zipkin-layout-factory-incubating-0.0.5-source-release.zip.asc">asc</a></td>
-      <td style="text-align: left"><a href="https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin/zipkin-layout-factory/0.0.5/apache-zipkin-layout-factory-incubating-0.0.5-source-release.zip.sha512">sha512</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin-layout-factory/0.0.5/apache-zipkin-layout-factory-incubating-0.0.5-source-release.zip.asc">asc</a></td>
+      <td style="text-align: left"><a href="https://www.apache.org/dist/incubator/zipkin/zipkin-layout-factory/0.0.5/apache-zipkin-layout-factory-incubating-0.0.5-source-release.zip.sha512">sha512</a></td>
     </tr>
   </tbody>
 </table>
diff --git a/zipkin-api/DISCLAIMER b/zipkin-api/DISCLAIMER
new file mode 100644
index 0000000..f73ab06
--- /dev/null
+++ b/zipkin-api/DISCLAIMER
@@ -0,0 +1,5 @@
+Apache Zipkin (incubating) is an effort undergoing incubation at The Apache Software Foundation
(ASF), sponsored by the Apache Incubator PMC.
+Incubation is required of all newly accepted projects until a further review indicates 
+that the infrastructure, communications, and decision making process have stabilized in a
manner consistent with other successful ASF projects. 
+While incubation status is not necessarily a reflection of the completeness or stability
of the code, 
+it does indicate that the project has yet to be fully endorsed by the ASF.
diff --git a/zipkin-api/Jenkinsfile b/zipkin-api/Jenkinsfile
new file mode 100644
index 0000000..9a05384
--- /dev/null
+++ b/zipkin-api/Jenkinsfile
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+pipeline {
+    agent {
+        label 'ubuntu'
+    }
+
+    tools {
+        jdk 'JDK 1.8 (latest)'
+    }
+
+    options {
+        buildDiscarder(logRotator(
+            numToKeepStr: '30',
+        ))
+        timestamps()
+        skipStagesAfterUnstable()
+        timeout time: 30, unit: 'MINUTES'
+    }
+
+    stages {
+        stage('SCM Checkout') {
+            steps {
+                deleteDir()
+                checkout scm
+            }
+        }
+
+        stage('Check environment') {
+            steps {
+                sh 'env'
+                sh 'pwd'
+                sh 'ls'
+                sh 'git status'
+            }
+        }
+
+        stage('Publish snapshot') {
+            when {
+                branch 'master'
+            }
+            steps {
+                sh './mvnw deploy -Papache-release -Dgpg.skip=true -DskipTests --batch-mode
-nsu'
+            }
+        }
+    }
+
+    post {
+        changed {
+            script {
+                if (env.BRANCH_NAME == 'master') {
+                    emailext(
+                        subject: "[${currentBuild.projectName}] master is ${currentBuild.currentResult}
(#${currentBuild.number})",
+                        to: 'commits@zipkin.apache.org',
+                        replyTo: 'dev@zipkin.apache.org',
+                        body: "See <${currentBuild.absoluteUrl}>"
+                    )
+                }
+            }
+
+        }
+    }
+}
diff --git a/zipkin-api/LICENSE b/zipkin-api/LICENSE
new file mode 100644
index 0000000..8dada3e
--- /dev/null
+++ b/zipkin-api/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+      this License, without any additional terms or conditions.
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+   END OF TERMS AND CONDITIONS
+
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+
+   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.
diff --git a/zipkin-api/NOTICE b/zipkin-api/NOTICE
new file mode 100644
index 0000000..d2f1493
--- /dev/null
+++ b/zipkin-api/NOTICE
@@ -0,0 +1,5 @@
+Language independent interchange formats for Apache Zipkin (incubating)
+Copyright 2019 The Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).
diff --git a/zipkin-api/zipkin.proto b/zipkin-api/zipkin.proto
new file mode 100644
index 0000000..9e65112
--- /dev/null
+++ b/zipkin-api/zipkin.proto
@@ -0,0 +1,237 @@
+//
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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.
+//
+syntax = "proto3";
+
+package zipkin.proto3;
+
+// In Java, the closest model type to this proto is in the "zipkin2" package
+option java_package = "zipkin2.proto3";
+option java_multiple_files = true;
+
+// A span is a single-host view of an operation. A trace is a series of spans
+// (often RPC calls) which nest to form a latency tree. Spans are in the same
+// trace when they share the same trace ID. The parent_id field establishes the
+// position of one span in the tree.
+//
+// The root span is where parent_id is Absent and usually has the longest
+// duration in the trace. However, nested asynchronous work can materialize as
+// child spans whose duration exceed the root span.
+//
+// Spans usually represent remote activity such as RPC calls, or messaging
+// producers and consumers. However, they can also represent in-process
+// activity in any position of the trace. For example, a root span could
+// represent a server receiving an initial client request. A root span could
+// also represent a scheduled job that has no remote context.
+//
+// Encoding notes:
+//
+// Epoch timestamp are encoded fixed64 as varint would also be 8 bytes, and more
+// expensive to encode and size. Duration is stored uint64, as often the numbers
+// are quite small.
+//
+// Default values are ok, as only natural numbers are used. For example, zero is
+// an invalid timestamp and an invalid duration, false values for debug or shared
+// are ignorable, and zero-length strings also coerce to null.
+//
+// The next id is 14.
+//
+// Note fields up to 15 take 1 byte to encode. Take care when adding new fields
+// https://developers.google.com/protocol-buffers/docs/proto3#assigning-tags
+message Span {
+  // Randomly generated, unique identifier for a trace, set on all spans within
+  // it.
+  //
+  // This field is required and encoded as 8 or 16 bytes, in big endian byte
+  // order.
+  bytes trace_id = 1;
+  // The parent span ID or absent if this the root span in a trace.
+  bytes parent_id = 2;
+  // Unique identifier for this operation within the trace.
+  //
+  // This field is required and encoded as 8 opaque bytes.
+  bytes id = 3;
+  // When present, kind clarifies timestamp, duration and remote_endpoint. When
+  // absent, the span is local or incomplete. Unlike client and server, there
+  // is no direct critical path latency relationship between producer and
+  // consumer spans.
+  enum Kind {
+    // Default value interpreted as absent.
+    SPAN_KIND_UNSPECIFIED = 0;
+    // The span represents the client side of an RPC operation, implying the
+    // following:
+    //
+    // timestamp is the moment a request was sent to the server.
+    // duration is the delay until a response or an error was received.
+    // remote_endpoint is the server.
+    CLIENT = 1;
+    // The span represents the server side of an RPC operation, implying the
+    // following:
+    //
+    // timestamp is the moment a client request was received.
+    // duration is the delay until a response was sent or an error.
+    // remote_endpoint is the client.
+    SERVER = 2;
+    // The span represents production of a message to a remote broker, implying
+    // the following:
+    //
+    // timestamp is the moment a message was sent to a destination.
+    // duration is the delay sending the message, such as batching.
+    // remote_endpoint is the broker.
+    PRODUCER = 3;
+    // The span represents consumption of a message from a remote broker, not
+    // time spent servicing it. For example, a message processor would be an
+    // in-process child span of a consumer. Consumer spans imply the following:
+    //
+    // timestamp is the moment a message was received from an origin.
+    // duration is the delay consuming the message, such as from backlog.
+    // remote_endpoint is the broker.
+    CONSUMER = 4;
+  }
+  // When present, used to interpret remote_endpoint
+  Kind kind = 4;
+  // The logical operation this span represents in lowercase (e.g. rpc method).
+  // Leave absent if unknown.
+  //
+  // As these are lookup labels, take care to ensure names are low cardinality.
+  // For example, do not embed variables into the name.
+  string name = 5;
+  // Epoch microseconds of the start of this span, possibly absent if
+  // incomplete.
+  //
+  // For example, 1502787600000000 corresponds to 2017-08-15 09:00 UTC
+  //
+  // This value should be set directly by instrumentation, using the most
+  // precise value possible. For example, gettimeofday or multiplying epoch
+  // millis by 1000.
+  //
+  // There are three known edge-cases where this could be reported absent.
+  // - A span was allocated but never started (ex not yet received a timestamp)
+  // - The span's start event was lost
+  // - Data about a completed span (ex tags) were sent after the fact
+  fixed64 timestamp = 6;
+  // Duration in microseconds of the critical path, if known. Durations of less
+  // than one are rounded up. Duration of children can be longer than their
+  // parents due to asynchronous operations.
+  //
+  // For example 150 milliseconds is 150000 microseconds.
+  uint64 duration = 7;
+  // The host that recorded this span, primarily for query by service name.
+  //
+  // Instrumentation should always record this. Usually, absent implies late
+  // data. The IP address corresponding to this is usually the site local or
+  // advertised service address. When present, the port indicates the listen
+  // port.
+  Endpoint local_endpoint = 8;
+  // When an RPC (or messaging) span, indicates the other side of the
+  // connection.
+  //
+  // By recording the remote endpoint, your trace will contain network context
+  // even if the peer is not tracing. For example, you can record the IP from
+  // the "X-Forwarded-For" header or the service name and socket of a remote
+  // peer.
+  Endpoint remote_endpoint = 9;
+  // Associates events that explain latency with the time they happened.
+  repeated Annotation annotations = 10;
+  // Tags give your span context for search, viewing and analysis.
+  //
+  // For example, a key "your_app.version" would let you lookup traces by
+  // version. A tag "sql.query" isn't searchable, but it can help in debugging
+  // when viewing a trace.
+  map<string, string> tags = 11;
+  // True is a request to store this span even if it overrides sampling policy.
+  //
+  // This is true when the "X-B3-Flags" header has a value of 1.
+  bool debug = 12;
+  // True if we are contributing to a span started by another tracer (ex on a
+  // different host).
+  bool shared = 13;
+}
+
+// The network context of a node in the service graph.
+//
+// The next id is 5.
+message Endpoint {
+  // Lower-case label of this node in the service graph, such as "favstar".
+  // Leave absent if unknown.
+  //
+  // This is a primary label for trace lookup and aggregation, so it should be
+  // intuitive and consistent. Many use a name from service discovery.
+  string service_name = 1;
+  // 4 byte representation of the primary IPv4 address associated with this
+  // connection. Absent if unknown.
+  bytes ipv4 = 2;
+  // 16 byte representation of the primary IPv6 address associated with this
+  // connection. Absent if unknown.
+  //
+  // Prefer using the ipv4 field for mapped addresses.
+  bytes ipv6 = 3;
+  // Depending on context, this could be a listen port or the client-side of a
+  // socket. Absent if unknown.
+  int32 port = 4;
+}
+
+// Associates an event that explains latency with a timestamp.
+// Unlike log statements, annotations are often codes. Ex. "ws" for WireSend
+//
+// The next id is 3.
+message Annotation {
+  // Epoch microseconds of this event.
+  //
+  // For example, 1502787600000000 corresponds to 2017-08-15 09:00 UTC
+  //
+  // This value should be set directly by instrumentation, using the most
+  // precise value possible. For example, gettimeofday or multiplying epoch
+  // millis by 1000.
+  fixed64 timestamp = 1;
+  // Usually a short tag indicating an event, like "error"
+  //
+  // While possible to add larger data, such as garbage collection details, low
+  // cardinality event names both keep the size of spans down and also are easy
+  // to search against.
+  string value = 2;
+}
+
+// A list of spans with possibly different trace ids, in no particular order.
+//
+// This is used for all transports: POST, Kafka messages etc. No other fields
+// are expected, This message facilitates the mechanics of encoding a list, as
+// a field number is required. The name of this type is the same in the OpenApi
+// aka Swagger specification. https://zipkin.io/zipkin-api/#/default/post_spans
+message ListOfSpans {
+  repeated Span spans = 1;
+}
+
+// Response for SpanService/Report RPC. This response currently does not return
+// any information beyond indicating that the request has finished. That said,
+// it may be extended in the future.
+message ReportResponse {
+}
+
+// SpanService allows reporting spans using gRPC, as opposed to HTTP POST 
+// reporting. Implementations are asynchronous and may drop spans for reasons 
+// of sampling or storage availability. While this is primarily used to store 
+// spans, other operations may take place such as aggregation of service 
+// dependencies or data cleaning.
+service SpanService {
+
+  // Report the provided spans to the collector. Analogous to the HTTP POST 
+  // /api/v2/spans endpoint. Spans are not required to be complete or belonging 
+  // to the same trace.
+  rpc Report(ListOfSpans) returns (ReportResponse) {}
+}


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