Add env var TEAMCITY_OTEL_PLUGIN_TRACE_ID to builds

server/src/main/java/com/octopus/teamcity/opentelemetry/server/BuildParameterPreProcessor.java

@@ -0,0 +1,36 @@
+package com.octopus.teamcity.opentelemetry.server;
+
+import jetbrains.buildServer.serverSide.ParametersPreprocessor;
+import jetbrains.buildServer.serverSide.SRunningBuild;
+import org.apache.log4j.Logger;
+import org.apache.logging.log4j.CloseableThreadContext;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Map;
+
+public class BuildParameterPreProcessor implements ParametersPreprocessor  {
+    private static final Logger LOG = Logger.getLogger(BuildParameterPreProcessor.class.getName());
+
+    @NotNull
+    private final BuildStorageManager buildStorageManager;
+
+    BuildParameterPreProcessor(@NotNull BuildStorageManager buildStorageManager) {
+        this.buildStorageManager = buildStorageManager;
+    }
+
+    @Override
+    public void fixRunBuildParameters(@NotNull SRunningBuild build, @NotNull Map<String, String> runParameters, @NotNull Map<String, String> buildParams) {
+        try (var ignored = CloseableThreadContext.put("teamcity.build.id", String.valueOf(build.getBuildId()))) {
+            LOG.debug(String.format("Looking up launch uuid for for build id %d, to add to the build parameters", build.getBuildId()));
+            var traceId = buildStorageManager.getTraceId(build);
+
+            if (traceId == null) {
+                LOG.warn(String.format("Unable to get launch uuid for build id %d; we cant set the build parameters", build.getBuildId()));
+                return;
+            }
+            LOG.debug(String.format("Adding trace id '%s' to build parameters for build %d", traceId, build.getBuildId()));
+
+            buildParams.put("env.TEAMCITY_OTEL_PLUGIN_TRACE_ID", traceId);
+        }
+    }
+}

server/src/main/resources/META-INF/build-server-plugin-Octopus.TeamCity.Opentelemetry.xml

@@ -9,6 +9,7 @@
     <bean class="com.octopus.teamcity.opentelemetry.server.ProjectConfigurationTab"/>
     <bean class="com.octopus.teamcity.opentelemetry.server.ProjectConfigurationSettingsController"/>
     <bean class="com.octopus.teamcity.opentelemetry.server.BuildOverviewExtensionController"/>
+    <bean class="com.octopus.teamcity.opentelemetry.server.BuildParameterPreProcessor"/>
     <bean class="com.octopus.teamcity.opentelemetry.server.helpers.HelperPerBuildOTELHelperFactory"/>
     <bean class="com.octopus.teamcity.opentelemetry.server.endpoints.OTELEndpointFactory"/>
     <bean class="com.octopus.teamcity.opentelemetry.server.BuildStorageManagerImpl"/>