Move servlet filter init failure test to open source.

PiperOrigin-RevId: 447853756
Change-Id: I9d6ba66c23c72c53c68b5d22a1f8147ecb1d35d2

runtime/failinitfilterwebapp/pom.xml

@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2021 Google LLC
+
+ Licensed 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
+
+     https://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.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+    <packaging>war</packaging>
+    <version>1.0</version>
+
+    <groupId>com.google.appengine.demos</groupId>
+    <artifactId>failinitfilterwebapp</artifactId>
+    <name>AppEngine :: failinitfilterwebapp</name>
+
+    <properties>
+        <appengine.app.version>1</appengine.app.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>servlet-api</artifactId>
+            <version>2.5</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <outputDirectory>target/${project.artifactId}-${project.version}/WEB-INF/classes</outputDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-war-plugin</artifactId>
+                <version>3.3.2</version>
+                <configuration>
+                    <archiveClasses>true</archiveClasses>
+                    <webResources>
+                        <!-- in order to interpolate version from pom into appengine-web.xml -->
+                        <resource>
+                            <directory>${basedir}/src/main/webapp/WEB-INF</directory>
+                            <filtering>true</filtering>
+                            <targetPath>WEB-INF</targetPath>
+                        </resource>
+                    </webResources>
+                </configuration>
+            </plugin>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.10.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>com.google.cloud.tools</groupId>
+                <artifactId>appengine-maven-plugin</artifactId>
+                <version>2.4.1</version>
+                <configuration>
+                    <projectId>ludo-in-in</projectId>
+                    <version>failinitfilter</version>
+                    <promote>false</promote>
+                    <automaticRestart>true</automaticRestart>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

runtime/failinitfilterwebapp/src/main/java/FailInitializationFilter.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Licensed 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
+ *
+ *     https://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.
+ */
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+
+public class FailInitializationFilter implements Filter {
+  @Override
+  public void init(FilterConfig config) throws ServletException {
+    throw new ServletException("Intentionally failing to initialize.");
+  }
+
+  @Override
+  public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
+      throws ServletException {
+    throw new ServletException("Unexpectedly got a request.");
+  }
+
+  @Override
+  public void destroy() {}
+}

runtime/failinitfilterwebapp/src/main/webapp/WEB-INF/appengine-generated/app.yaml

@@ -0,0 +1,25 @@
+# Copyright 2021 Google LLC
+#
+# Licensed 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
+#
+#     https://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.
+#
+runtime: java8
+inbound_services:
+- warmup
+threadsafe: True
+auto_id_policy: default
+api_version: 'user_defined'
+handlers:
+- url: /.*
+  script: unused
+  login: optional
+  secure: optional

runtime/failinitfilterwebapp/src/main/webapp/WEB-INF/appengine-web.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2021 Google LLC
+
+ Licensed 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
+
+     https://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.
+-->
+<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
+    <threadsafe>true</threadsafe>
+    <runtime>java8</runtime>
+</appengine-web-app>

runtime/failinitfilterwebapp/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2021 Google LLC
+
+ Licensed 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
+
+     https://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.
+-->
+<web-app
+   xmlns="http://java.sun.com/xml/ns/javaee"
+   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+   version="2.5">
+    <filter>
+        <filter-name>FailInitializationFilter</filter-name>
+        <filter-class>FailInitializationFilter</filter-class>
+    </filter>
+    <filter-mapping>
+        <filter-name>FailInitializationFilter</filter-name>
+        <url-pattern>/*</url-pattern>
+    </filter-mapping>
+</web-app>

runtime/nogaeapiswebapp/src/main/webapp/WEB-INF/web.xml

@@ -14,9 +14,12 @@
  See the License for the specific language governing permissions and
  limitations under the License.
 -->
-<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_2_5.xsd">
-
-    <servlet>
+<web-app
+   xmlns="http://java.sun.com/xml/ns/javaee"
+   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+   version="2.5">
+  <servlet>
         <servlet-name>NoGaeApisServlet</servlet-name>
         <servlet-class>NoGaeApisServlet</servlet-class>
     </servlet>

runtime/pom.xml

@@ -35,6 +35,7 @@
     <module>deployment</module>
     <module>local</module>
     <module>nogaeapiswebapp</module>
+    <module>failinitfilterwebapp</module>
     <module>test</module>
     <module>testapps</module>
   </modules>

runtime/test/src/test/java/com/google/apphosting/runtime/jetty9/FailureFilterTest.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Licensed 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
+ *
+ *     https://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.
+ */
+package com.google.apphosting.runtime.jetty9;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import java.io.File;
+import java.io.IOException;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+@RunWith(JUnit4.class)
+public final class FailureFilterTest extends JavaRuntimeViaHttpBase {
+
+  private static File appRoot;
+
+  @BeforeClass
+  public static void beforeClass() throws IOException, InterruptedException {
+    File currentDirectory = new File("").getAbsoluteFile();
+    appRoot = new File(currentDirectory, "../failinitfilterwebapp/target/failinitfilterwebapp-1.0");
+    assertThat(appRoot.isDirectory()).isTrue();
+  }
+
+  private RuntimeContext<DummyApiServer> runtimeContext() throws IOException, InterruptedException {
+    RuntimeContext.Config<DummyApiServer> config =
+        RuntimeContext.Config.builder().setApplicationPath(appRoot.toString()).build();
+    return RuntimeContext.create(config);
+  }
+
+  @Test
+  public void testFilterInitFailed() throws Exception {
+    try (RuntimeContext<DummyApiServer> runtime = runtimeContext()) {
+      assertThat(runtime.executeHttpGet("/", 500))
+          .contains("javax.servlet.ServletException: Intentionally failing to initialize.");
+    }
+  }
+}