[APM] Add link-to/transaction route

x-pack/plugins/apm/public/components/app/transaction_link/index.tsx

@@ -0,0 +1,67 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { EuiEmptyPrompt } from '@elastic/eui';
+import React from 'react';
+import { Redirect, RouteComponentProps } from 'react-router-dom';
+import { euiStyled } from '../../../../../../../src/plugins/kibana_react/common';
+import { FETCH_STATUS, useFetcher } from '../../../hooks/use_fetcher';
+import { useUrlParams } from '../../../context/url_params_context/use_url_params';
+import { getRedirectToTransactionDetailPageUrl } from '../TraceLink/get_redirect_to_transaction_detail_page_url';
+
+const CentralizedContainer = euiStyled.div`
+  height: 100%;
+  display: flex;
+`;
+
+export function TransactionLink({
+  match,
+}: RouteComponentProps<{ transactionId: string }>) {
+  const { transactionId } = match.params;
+  const { urlParams } = useUrlParams();
+  const { rangeFrom, rangeTo } = urlParams;
+
+  const { data = { transaction: null }, status } = useFetcher(
+    (callApmApi) => {
+      if (transactionId) {
+        return callApmApi({
+          endpoint: 'GET /api/apm/transactions/{transactionId}',
+          params: {
+            path: {
+              transactionId,
+            },
+          },
+        });
+      }
+    },
+    [transactionId]
+  );
+  if (transactionId && status === FETCH_STATUS.SUCCESS) {
+    if (data.transaction) {
+      return (
+        <Redirect
+          to={getRedirectToTransactionDetailPageUrl({
+            transaction: data.transaction,
+            rangeFrom,
+            rangeTo,
+          })}
+        />
+      );
+    }
+
+    return <CentralizedContainer />;
+  }
+
+  return (
+    <CentralizedContainer>
+      <EuiEmptyPrompt
+        iconType="apmTrace"
+        title={<h2>Fetching transaction...</h2>}
+      />
+    </CentralizedContainer>
+  );
+}

x-pack/plugins/apm/public/components/routing/apm_route_config.tsx

@@ -20,6 +20,7 @@ import { AnomalyDetection } from '../app/Settings/anomaly_detection';
 import { ApmIndices } from '../app/Settings/ApmIndices';
 import { CustomizeUI } from '../app/Settings/CustomizeUI';
 import { TraceLink } from '../app/TraceLink';
+import { TransactionLink } from '../app/transaction_link';
 import { TransactionDetails } from '../app/transaction_details';
 import { enableServiceOverview } from '../../../common/ui_settings_keys';
 import { redirectTo } from './redirect_to';
@@ -510,6 +511,12 @@ export const apmRouteConfig: APMRouteDefinition[] = [
     component: TraceLink,
     breadcrumb: null,
   },
+  {
+    exact: true,
+    path: '/link-to/transaction/:transactionId',
+    component: TransactionLink,
+    breadcrumb: null,
+  },
 ];
 
 function RedirectToDefaultServiceRouteView(

x-pack/plugins/apm/server/lib/transactions/get_transaction/index.ts

@@ -21,11 +21,11 @@ export function getTransaction({
   setup,
 }: {
   transactionId: string;
-  traceId: string;
-  setup: Setup & SetupTimeRange;
+  traceId?: string;
+  setup: Setup | (Setup & SetupTimeRange);
 }) {
   return withApmSpan('get_transaction', async () => {
-    const { start, end, apmEventClient } = setup;
+    const { apmEventClient } = setup;
 
     const resp = await apmEventClient.search({
       apm: {
@@ -37,8 +37,8 @@ export function getTransaction({
           bool: {
             filter: asMutableArray([
               { term: { [TRANSACTION_ID]: transactionId } },
-              { term: { [TRACE_ID]: traceId } },
-              ...rangeQuery(start, end),
+              ...(traceId ? [{ term: { [TRACE_ID]: traceId } }] : []),
+              ...('start' in setup ? rangeQuery(setup.start, setup.end) : []),
             ]),
           },
         },

x-pack/plugins/apm/server/routes/traces.ts

@@ -14,6 +14,7 @@ import { environmentRt, kueryRt, rangeRt } from './default_api_types';
 import { getSearchAggregatedTransactions } from '../lib/helpers/aggregated_transactions';
 import { getRootTransactionByTraceId } from '../lib/transactions/get_transaction_by_trace';
 import { createApmServerRouteRepository } from './create_apm_server_route_repository';
+import { getTransaction } from '../lib/transactions/get_transaction';
 
 const tracesRoute = createApmServerRoute({
   endpoint: 'GET /api/apm/traces',
@@ -70,7 +71,24 @@ const rootTransactionByTraceIdRoute = createApmServerRoute({
   },
 });
 
+const transactionByIdRoute = createApmServerRoute({
+  endpoint: 'GET /api/apm/transactions/{transactionId}',
+  params: t.type({
+    path: t.type({
+      transactionId: t.string,
+    }),
+  }),
+  options: { tags: ['access:apm'] },
+  handler: async (resources) => {
+    const { params } = resources;
+    const { transactionId } = params.path;
+    const setup = await setupRequest(resources);
+    return { transaction: await getTransaction({ transactionId, setup }) };
+  },
+});
+
 export const traceRouteRepository = createApmServerRouteRepository()
   .add(tracesByIdRoute)
   .add(tracesRoute)
-  .add(rootTransactionByTraceIdRoute);
+  .add(rootTransactionByTraceIdRoute)
+  .add(transactionByIdRoute);