#19 servlet - embedded tomcat

my-framework/was-practice/build.gradle

@@ -10,6 +10,10 @@ repositories {
 }
 
 dependencies {
+    // embedded tomcat
+    implementation 'org.apache.tomcat.embed:tomcat-embed-core:8.5.82'
+    implementation 'org.apache.tomcat.embed:tomcat-embed-jasper:8.5.82'
+
     implementation 'ch.qos.logback:logback-classic:1.2.3'
 
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'

my-framework/was-practice/src/main/java/org/example/CalculatorServlet.java

@@ -0,0 +1,31 @@
+package org.example;
+
+import org.example.calculator.domain.Calculator;
+import org.example.calculator.domain.PositiveNumber;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+//@WebServlet("/calculate")
+public class CalculatorServlet extends HttpServlet {
+    private static final Logger log = LoggerFactory.getLogger(CalculatorServlet.class);
+
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
+        log.info("service");
+        int operand1 = Integer.parseInt(request.getParameter("operand1"));
+        String operator = request.getParameter("operator");
+        int operand2 = Integer.parseInt(request.getParameter("operand2"));
+
+        int result = Calculator.calculate(new PositiveNumber(operand1), operator, new PositiveNumber(operand2));
+
+        PrintWriter writer = response.getWriter();
+        writer.println(result);
+    }
+}

my-framework/was-practice/src/main/java/org/example/WebApplicationServerLauncher.java

@@ -0,0 +1,48 @@
+package org.example;
+
+import org.apache.catalina.Context;
+import org.apache.catalina.LifecycleException;
+import org.apache.catalina.startup.Tomcat;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.servlet.http.HttpServlet;
+import java.io.File;
+
+public class WebApplicationServerLauncher {
+
+    private static final Logger logger = LoggerFactory.getLogger(WebApplicationServerLauncher.class);
+
+    public static void main(String[] args) throws LifecycleException {
+
+        // 내장 톰캣
+//        String appBase = "webapp/";
+//
+//        Tomcat tomcat = new Tomcat();
+//        tomcat.setPort(8080);
+//
+//        tomcat.addWebapp("/", new File(appBase).getAbsolutePath());
+//        logger.info("configuring app with basedir: {}", new File("./" + appBase).getAbsolutePath());
+//
+//        tomcat.start();
+//        tomcat.getServer().await();
+
+        String appBase = "webapp/";
+
+        Tomcat tomcat = new Tomcat();
+        tomcat.setPort(8080);
+
+        Context context = tomcat.addContext("", new File(appBase).getAbsolutePath());
+        HttpServlet calculatorServlet = new CalculatorServlet();
+        String servletName = "calculate";
+        String urlPattern = "/calculate";
+
+        tomcat.addServlet("", servletName, calculatorServlet);
+        context.addServletMappingDecoded(urlPattern, servletName);
+
+        logger.info("configuring app with basedir: {}", new File("./" + appBase).getAbsolutePath());
+
+        tomcat.start();
+        tomcat.getServer().await();
+    }
+}

my-framework/was-practice/src/main/java/org/example/was/ClientRequestHandler.java

@@ -1,4 +1,4 @@
-package org.example;
+package org.example.was;
 
 import org.example.calculator.domain.Calculator;
 import org.example.calculator.domain.PositiveNumber;

my-framework/was-practice/src/main/java/org/example/was/CustomWebApplicationServer.java

@@ -1,4 +1,4 @@
-package org.example;
+package org.example.was;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

my-framework/was-practice/src/main/java/org/example/was/HttpRequest.java

@@ -1,4 +1,4 @@
-package org.example;
+package org.example.was;
 
 import java.io.BufferedReader;
 import java.io.IOException;

my-framework/was-practice/src/main/java/org/example/was/HttpResponse.java

@@ -1,4 +1,4 @@
-package org.example;
+package org.example.was;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

my-framework/was-practice/src/main/java/org/example/was/Main.java

@@ -1,4 +1,4 @@
-package org.example;
+package org.example.was;
 
 import java.io.IOException;
 

my-framework/was-practice/src/main/java/org/example/was/QueryString.java

@@ -1,4 +1,4 @@
-package org.example;
+package org.example.was;
 
 public class QueryString {
     private final String key;

my-framework/was-practice/src/main/java/org/example/was/QueryStrings.java

@@ -1,4 +1,4 @@
-package org.example;
+package org.example.was;
 
 import java.util.ArrayList;
 import java.util.Arrays;

my-framework/was-practice/src/main/java/org/example/was/RequestLine.java

@@ -1,4 +1,4 @@
-package org.example;
+package org.example.was;
 
 import java.util.Objects;
 

my-framework/was-practice/src/main/java/org/example/was/counter/Counter.java

@@ -1,4 +1,4 @@
-package org.example.counter;
+package org.example.was.counter;
 
 public class Counter implements Runnable {
     private int count = 0;

my-framework/was-practice/src/main/java/org/example/was/counter/RaceConditionDemo.java

@@ -1,4 +1,4 @@
-package org.example.counter;
+package org.example.was.counter;
 
 public class RaceConditionDemo {
 

my-framework/was-practice/src/test/java/org/example/QueryStringTest.java

@@ -1,6 +1,7 @@
 package org.example;
 
 import org.assertj.core.api.Assertions;
+import org.example.was.QueryString;
 import org.junit.jupiter.api.Test;
 
 public class QueryStringTest {

my-framework/was-practice/src/test/java/org/example/QueryStringsTest.java

@@ -1,6 +1,7 @@
 package org.example;
 
 import org.assertj.core.api.Assertions;
+import org.example.was.QueryStrings;
 import org.junit.jupiter.api.Test;
 
 public class QueryStringsTest {

my-framework/was-practice/src/test/java/org/example/RequestLineTest.java

@@ -1,5 +1,6 @@
 package org.example;
 
+import org.example.was.RequestLine;
 import org.junit.jupiter.api.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;

my-framework/was-practice/test.http

@@ -1 +1 @@
-GET http://localhost:8080/calculate?operand1=10&operator=-&operand2=20
+GET http://localhost:8080/calculate?operand1=10&operator=%2b&operand2=20

my-framework/was-practice/webapp/index.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Hello World!</title>
+</head>
+<body>
+  <h1>Hello World!</h1>
+</body>
+</html>