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SirAnimeshSirAnimesh
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Containerise application
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‎Dockerfile

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FROM maven:3.8.6-openjdk-8-slim AS build
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WORKDIR /app
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COPY . .
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RUN mvn clean install
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FROM tomcat:9.0-jre8-temurin
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# Tomcat Docker Hub page (https://hub.docker.com/_/tomcat) has this warning:
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# As of docker-library/tomcat#181 (https://github.com/docker-library/tomcat/pull/181)⁠, the upstream-provided (example)
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# webapps are not enabled by default, per upstream's security recommendations.
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# (https://tomcat.apache.org/tomcat-9.0-doc/security-howto.html#Default_web_applications)⁠,
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# These apps are still available under the webapps.dist folder within the image to make them easier to re-enable.
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# So we move some folders around to re-enable the default behaviour
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RUN mv /usr/local/tomcat/webapps /usr/local/tomcat/webapps.empty
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RUN mv /usr/local/tomcat/webapps.dist /usr/local/tomcat/webapps
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COPY --from=build /app/target/DemoServlet.war /usr/local/tomcat/webapps/
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# Enable manager mode
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COPY --from=build /app/tomcat/manager/context.xml /usr/local/tomcat/webapps/manager/META-INF/
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COPY --from=build /app/tomcat/tomcat-users.xml /usr/local/tomcat/conf/
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# Enable examples access from remote host
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COPY --from=build /app/tomcat/examples/context.xml /usr/local/tomcat/webapps/examples/META-INF/
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# Logging
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COPY --from=build /app/tomcat/logging.properties /usr/local/tomcat/conf/
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EXPOSE 8080
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CMD ["catalina.sh", "run"]

‎Readme.md

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3. Add your database connection settings to `DBConnection.java`
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4. Run the application on Apache Tomcat server
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If you have Docker, run `docker compose up` and visit `http://localhost:4000/demo/` in the browser.
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### Screenshots
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If everything is up and running properly, you should be able to use the following functionality:

‎compose.yaml

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services:
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app:
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build:
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dockerfile: Dockerfile
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container_name: demo-java-ee-servlet
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image: demo-java-ee-servlet:1.0
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ports:
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- 4000:8080
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environment:
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MYSQL_DB: db
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MYSQL_HOST: demo-java-ee-servlet-db
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MYSQL_PASSWORD: password
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MYSQL_USER: user
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database:
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image: mysql:latest
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container_name: demo-java-ee-servlet-db
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environment:
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MYSQL_DATABASE: db
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MYSQL_PASSWORD: password
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MYSQL_ROOT_PASSWORD: password
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MYSQL_USER: user
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volumes:
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- ./database:/docker-entrypoint-initdb.d:ro

‎tomcat/examples/context.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<Context>
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<CookieProcessor className="org.apache.tomcat.util.http.Rfc6265CookieProcessor"
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sameSiteCookies="strict" />
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<!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"
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allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" /> -->
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</Context>

‎tomcat/logging.properties

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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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handlers = 1catalina.org.apache.juli.AsyncFileHandler, 2localhost.org.apache.juli.AsyncFileHandler, 3manager.org.apache.juli.AsyncFileHandler, 4host-manager.org.apache.juli.AsyncFileHandler, java.util.logging.ConsoleHandler
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.handlers = 1catalina.org.apache.juli.AsyncFileHandler, java.util.logging.ConsoleHandler
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############################################################
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# Handler specific properties.
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# Describes specific configuration info for Handlers.
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############################################################
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1catalina.org.apache.juli.AsyncFileHandler.level = ALL
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1catalina.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
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1catalina.org.apache.juli.AsyncFileHandler.prefix = catalina.
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1catalina.org.apache.juli.AsyncFileHandler.maxDays = 90
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1catalina.org.apache.juli.AsyncFileHandler.encoding = UTF-8
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2localhost.org.apache.juli.AsyncFileHandler.level = ALL
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2localhost.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
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2localhost.org.apache.juli.AsyncFileHandler.prefix = localhost.
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2localhost.org.apache.juli.AsyncFileHandler.maxDays = 90
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2localhost.org.apache.juli.AsyncFileHandler.encoding = UTF-8
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3manager.org.apache.juli.AsyncFileHandler.level = ALL
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3manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
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3manager.org.apache.juli.AsyncFileHandler.prefix = manager.
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3manager.org.apache.juli.AsyncFileHandler.maxDays = 90
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3manager.org.apache.juli.AsyncFileHandler.encoding = UTF-8
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4host-manager.org.apache.juli.AsyncFileHandler.level = ALL
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4host-manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
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4host-manager.org.apache.juli.AsyncFileHandler.prefix = host-manager.
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4host-manager.org.apache.juli.AsyncFileHandler.maxDays = 90
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4host-manager.org.apache.juli.AsyncFileHandler.encoding = UTF-8
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java.util.logging.ConsoleHandler.level = ALL
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java.util.logging.ConsoleHandler.formatter = org.apache.juli.OneLineFormatter
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java.util.logging.ConsoleHandler.encoding = UTF-8
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############################################################
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# Facility specific properties.
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# Provides extra control for each logger.
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############################################################
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org.apache.catalina.core.ContainerBase.[Catalina].[localhost].level = INFO
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org.apache.catalina.core.ContainerBase.[Catalina].[localhost].handlers = 2localhost.org.apache.juli.AsyncFileHandler
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org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].level = INFO
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org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].handlers = 3manager.org.apache.juli.AsyncFileHandler
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org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].level = INFO
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org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].handlers = 4host-manager.org.apache.juli.AsyncFileHandler
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# For example, set the org.apache.catalina.util.LifecycleBase logger to log
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# each component that extends LifecycleBase changing state:
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# org.apache.catalina.util.LifecycleBase.level = FINE
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# To see debug messages for HTTP/2 handling, uncomment the following line:
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# org.apache.coyote.http2.level = FINE
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# To see debug messages for WebSocket handling, uncomment the following line:
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# org.apache.tomcat.websocket.level = FINE

‎tomcat/manager/context.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<Context antiResourceLocking="false" privileged="true" >
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<CookieProcessor className="org.apache.tomcat.util.http.Rfc6265CookieProcessor"
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sameSiteCookies="strict" />
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<!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"
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allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" /> -->
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<Manager sessionAttributeValueClassNameFilter="java\.lang\.(?:Boolean|Integer|Long|Number|String)|org\.apache\.catalina\.filters\.CsrfPreventionFilter\$LruCache(?:\$1)?|java\.util\.(?:Linked)?HashMap"/>
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</Context>

‎tomcat/tomcat-users.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<tomcat-users xmlns="http://tomcat.apache.org/xml"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://tomcat.apache.org/xml tomcat-users.xsd"
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version="1.0">
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<!--
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By default, no user is included in the "manager-gui" role required
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to operate the "/manager/html" web application. If you wish to use this app,
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you must define such a user - the username and password are arbitrary.
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Built-in Tomcat manager roles:
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- manager-gui - allows access to the HTML GUI and the status pages
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- manager-script - allows access to the HTTP API and the status pages
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- manager-jmx - allows access to the JMX proxy and the status pages
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- manager-status - allows access to the status pages only
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The users below are wrapped in a comment and are therefore ignored. If you
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wish to configure one or more of these users for use with the manager web
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application, do not forget to remove the <!.. ..> that surrounds them. You
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will also need to set the passwords to something appropriate.
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-->
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<user username="admin" password="password" roles="manager-gui"/>
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<!-- <user username="robot" password="<must-be-changed>" roles="manager-script"/> -->
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<!--
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The sample user and role entries below are intended for use with the
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examples web application. They are wrapped in a comment and thus are ignored
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when reading this file. If you wish to configure these users for use with the
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examples web application, do not forget to remove the <!.. ..> that surrounds
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them. You will also need to set the passwords to something appropriate.
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-->
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<!--
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<role rolename="tomcat"/>
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<role rolename="role1"/>
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<user username="tomcat" password="<must-be-changed>" roles="tomcat"/>
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<user username="both" password="<must-be-changed>" roles="tomcat,role1"/>
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<user username="role1" password="<must-be-changed>" roles="role1"/>
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-->
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</tomcat-users>

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