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Hateoas
Commit c42909f5 authored by Divisha Agarwal's avatar Divisha Agarwal
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hateoas/.gitignore deleted 100644 → 0
View file @ 732de865
HELP.md
target/
!.mvn/wrapper/maven-wrapper.jar
!**/src/main/**
!**/src/test/**
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
build/
### VS Code ###
.vscode/
hateoas/.mvn/wrapper/MavenWrapperDownloader.java deleted 100644 → 0
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/*
* Copyright 2007-present the original author or authors.
*
* 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 java.net.*;
import java.io.*;
import java.nio.channels.*;
import java.util.Properties;
public class MavenWrapperDownloader {
private static final String WRAPPER_VERSION = "0.5.6";
/**
* Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
*/
private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+ WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
/**
* Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
* use instead of the default one.
*/
private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
".mvn/wrapper/maven-wrapper.properties";
/**
* Path where the maven-wrapper.jar will be saved to.
*/
private static final String MAVEN_WRAPPER_JAR_PATH =
".mvn/wrapper/maven-wrapper.jar";
/**
* Name of the property which should be used to override the default download url for the wrapper.
*/
private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
public static void main(String args[]) {
System.out.println("- Downloader started");
File baseDirectory = new File(args[0]);
System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
// If the maven-wrapper.properties exists, read it and check if it contains a custom
// wrapperUrl parameter.
File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
String url = DEFAULT_DOWNLOAD_URL;
if(mavenWrapperPropertyFile.exists()) {
FileInputStream mavenWrapperPropertyFileInputStream = null;
try {
mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
Properties mavenWrapperProperties = new Properties();
mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
} catch (IOException e) {
System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
} finally {
try {
if(mavenWrapperPropertyFileInputStream != null) {
mavenWrapperPropertyFileInputStream.close();
}
} catch (IOException e) {
// Ignore ...
}
}
}
System.out.println("- Downloading from: " + url);
File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
if(!outputFile.getParentFile().exists()) {
if(!outputFile.getParentFile().mkdirs()) {
System.out.println(
"- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
}
}
System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
try {
downloadFileFromURL(url, outputFile);
System.out.println("Done");
System.exit(0);
} catch (Throwable e) {
System.out.println("- Error downloading");
e.printStackTrace();
System.exit(1);
}
}
private static void downloadFileFromURL(String urlString, File destination) throws Exception {
if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
String username = System.getenv("MVNW_USERNAME");
char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
Authenticator.setDefault(new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
}
URL website = new URL(urlString);
ReadableByteChannel rbc;
rbc = Channels.newChannel(website.openStream());
FileOutputStream fos = new FileOutputStream(destination);
fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
fos.close();
rbc.close();
}
}
hateoas/.mvn/wrapper/maven-wrapper.properties deleted 100644 → 0
View file @ 732de865
distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar
hateoas/README.md deleted 100644 → 0
View file @ 732de865
# Hateoas
HATEOAS (Hypermedia as the Engine of Application State) is a constraint of the REST application architecture that keeps the RESTful style architecture unique from most other network
application architectures. The term “hypermedia” refers to any content that contains links to other forms of media such as images, movies, and text.
REST architectural style lets you use hypermedia links in the response contents so that the client can dynamically navigate to the appropriate resource by traversing the hypermedia
links. Above is conceptually the same as a web user browsing through web pages by clicking the relevant hyperlinks to achieve a final goal.
#ServerSide
Developed a Server side which will give a list of users but only 5 per page .And the link for next 5 and previous 5 is provided in the current page .
#ClientSide
Developed 2 clients:
1. Spring Rest Client:Uisng this with the help of get call,we are able to get the data from the rest service and save into 4 files separately according to our needs.
2. Apache Http Client:Using this also extracted the data from a rest service and saved into 4 different files.
\ No newline at end of file
hateoas/mvnw deleted 100644 → 0
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hateoas/mvnw.cmd deleted 100644 → 0
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@REM ----------------------------------------------------------------------------
@REM Licensed to the Apache Software Foundation (ASF) under one
@REM or more contributor license agreements. See the NOTICE file
@REM distributed with this work for additional information
@REM regarding copyright ownership. The ASF licenses this file
@REM to you under the Apache License, Version 2.0 (the
@REM "License"); you may not use this file except in compliance
@REM with the License. You may obtain a copy of the License at
@REM
@REM https://www.apache.org/licenses/LICENSE-2.0
@REM
@REM Unless required by applicable law or agreed to in writing,
@REM software distributed under the License is distributed on an
@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@REM KIND, either express or implied. See the License for the
@REM specific language governing permissions and limitations
@REM under the License.
@REM ----------------------------------------------------------------------------
@REM ----------------------------------------------------------------------------
@REM Maven Start Up Batch script
@REM
@REM Required ENV vars:
@REM JAVA_HOME - location of a JDK home dir
@REM
@REM Optional ENV vars
@REM M2_HOME - location of maven2's installed home dir
@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
@REM e.g. to debug Maven itself, use
@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
@REM ----------------------------------------------------------------------------
@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
@echo off
@REM set title of command window
title %0
@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO%
@REM set %HOME% to equivalent of $HOME
if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
@REM Execute a user defined script before this one
if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
@REM check for pre script, once with legacy .bat ending and once with .cmd ending
if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
:skipRcPre
@setlocal
set ERROR_CODE=0
@REM To isolate internal variables from possible post scripts, we use another setlocal
@setlocal
@REM ==== START VALIDATION ====
if not "%JAVA_HOME%" == "" goto OkJHome
echo.
echo Error: JAVA_HOME not found in your environment. >&2
echo Please set the JAVA_HOME variable in your environment to match the >&2
echo location of your Java installation. >&2
echo.
goto error
:OkJHome
if exist "%JAVA_HOME%\bin\java.exe" goto init
echo.
echo Error: JAVA_HOME is set to an invalid directory. >&2
echo JAVA_HOME = "%JAVA_HOME%" >&2
echo Please set the JAVA_HOME variable in your environment to match the >&2
echo location of your Java installation. >&2
echo.
goto error
@REM ==== END VALIDATION ====
:init
@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
@REM Fallback to current working directory if not found.
set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
set EXEC_DIR=%CD%
set WDIR=%EXEC_DIR%
:findBaseDir
IF EXIST "%WDIR%"\.mvn goto baseDirFound
cd ..
IF "%WDIR%"=="%CD%" goto baseDirNotFound
set WDIR=%CD%
goto findBaseDir
:baseDirFound
set MAVEN_PROJECTBASEDIR=%WDIR%
cd "%EXEC_DIR%"
goto endDetectBaseDir
:baseDirNotFound
set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
cd "%EXEC_DIR%"
:endDetectBaseDir
IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
@setlocal EnableExtensions EnableDelayedExpansion
for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
:endReadAdditionalConfig
SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
)
@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
if exist %WRAPPER_JAR% (
if "%MVNW_VERBOSE%" == "true" (
echo Found %WRAPPER_JAR%
)
) else (
if not "%MVNW_REPOURL%" == "" (
SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
)
if "%MVNW_VERBOSE%" == "true" (
echo Couldn't find %WRAPPER_JAR%, downloading it ...
echo Downloading from: %DOWNLOAD_URL%
)
powershell -Command "&{"^
"$webclient = new-object System.Net.WebClient;"^
"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
"}"^
"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
"}"
if "%MVNW_VERBOSE%" == "true" (
echo Finished downloading %WRAPPER_JAR%
)
)
@REM End of extension
@REM Provide a "standardized" way to retrieve the CLI args that will
@REM work with both Windows and non-Windows executions.
set MAVEN_CMD_LINE_ARGS=%*
%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
if ERRORLEVEL 1 goto error
goto end
:error
set ERROR_CODE=1
:end
@endlocal & set ERROR_CODE=%ERROR_CODE%
if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
@REM check for post script, once with legacy .bat ending and once with .cmd ending
if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
:skipRcPost
@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
if "%MAVEN_BATCH_PAUSE%" == "on" pause
if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
exit /B %ERROR_CODE%
hateoas/pom.xml deleted 100644 → 0
View file @ 732de865
<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.nisum</groupId>
<artifactId>hateoas</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>hateoas</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<mockito-core.version>1.10.19</mockito-core.version>
<powermock-module-junit4.version>2.0.4</powermock-module-junit4.version>
<powermock-api-mockito.version>1.7.4</powermock-api-mockito.version>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework.hateoas/spring-hateoas -->
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-hateoas -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-hateoas</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.8</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-cassandra -->
<dependency>
<groupId>org.springframework.hateoas</groupId>
<artifactId>spring-hateoas</artifactId>
<version>0.24.0.RELEASE</version>
<scope>compile</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.26</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.ws.rs/javax.ws.rs-api -->
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple -->
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
<exclusion>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>${mockito-core.version}</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.objenesis</groupId>
<artifactId>objenesis</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>${powermock-module-junit4.version}</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.powermock</groupId>
<artifactId>powermock-core</artifactId>
</exclusion>
<exclusion>
<groupId>org.powermock</groupId>
<artifactId>powermock-reflect</artifactId>
</exclusion>
<exclusion>
<groupId>org.objenesis</groupId>
<artifactId>objenesis</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito</artifactId>
<version>${powermock-api-mockito.version}</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
hateoas/src/main/java/com/nisum/Clients/HttpClient.java deleted 100644 → 0
View file @ 732de865
package com.nisum.clients;
import com.nisum.constants.Constants;
import com.nisum.utils.Utils;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.simple.JSONObject;
import org.json.simple.parser.ParseException;
import org.springframework.beans.factory.annotation.Autowired;
import java.io.IOException;
import java.net.URL;
@Slf4j
public class HttpClient {
private static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(HttpClient.class);
@Autowired
Utils utils;
//Using HTTP (Method 2)
public void getUsingHttpClient() throws IOException, ParseException {
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet getRequest = new HttpGet(Constants.URL_EMPLOYEES);
getRequest.addHeader("accept", "application/json");
HttpResponse response = httpClient.execute(getRequest);
if (response.getStatusLine().getStatusCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ response.getStatusLine().getStatusCode());
} else {
int i = 0;
JSONObject obj = null;
do {
if (i == 0) {
System.out.println(response);
obj = utils.getJsonObjectHttp(response, 0);
utils.saveInFile(obj, i);
} else {
URL url = new URL(obj.get("next").toString());
HttpGet getRequestNew = new HttpGet(url.toString());
getRequestNew.addHeader("accept", "application/json");
HttpResponse responseNew = httpClient.execute(getRequestNew);
JSONObject objnew = utils.getJsonObjectHttp(responseNew, i);
utils.saveInFile(objnew, i);
obj = objnew;
}
i++;
} while (i <= Constants.no_of_pages - 1);
httpClient.getConnectionManager().shutdown();
}
}
catch(RuntimeException e){
logger.info("RuntimeException "+e.getStackTrace());
}
}
}
hateoas/src/main/java/com/nisum/Clients/RestTemplateClient.java deleted 100644 → 0
View file @ 732de865
package com.nisum.clients;
import com.nisum.constants.Constants;
import com.nisum.utils.Utils;
import lombok.extern.slf4j.Slf4j;
import org.json.simple.JSONObject;
import org.json.simple.parser.ParseException;
import org.springframework.beans.factory.annotation.Autowired;
import java.io.IOException;
@Slf4j
public class RestTemplateClient {
private static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(HttpClient.class);
@Autowired
Utils utils;
//using Spring Rest Template(Method 1)
public void getUsingRestTemplate() {
try {
int i = 0;
JSONObject obj = null;
do {
if (i == 0) {
obj = utils.getJSONObject(Constants.URL_EMPLOYEES);
utils.saveInFile(obj, 0);
} else {
JSONObject objnew = utils.getJSONObject(obj.get("next").toString());
utils.saveInFile(objnew, i);
obj = objnew;
}
i++;
} while (i <= Constants.no_of_pages - 1);
}
catch(ParseException e){
logger.info("ParseException "+e.getStackTrace());
}
catch(IOException ex){
logger.info("IOException "+ex.getStackTrace());
}
}
}
hateoas/src/main/java/com/nisum/HateoasApplication.java deleted 100644 → 0
View file @ 732de865
package com.nisum;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class HateoasApplication {
public static void main(String[] args) {
SpringApplication.run(HateoasApplication.class, args);
}
}
hateoas/src/main/java/com/nisum/constants/Constants.java deleted 100644 → 0
View file @ 732de865
package com.nisum.constants;
public class Constants {
public static final int page_size=5;
public static final int no_of_pages=4;
public static final String URL_EMPLOYEES = "http://localhost:8080/start/users/0";
}
hateoas/src/main/java/com/nisum/controller/UserController.java deleted 100644 → 0
View file @ 732de865
package com.nisum.controller;
import com.nisum.model.FirstResponse;
import com.nisum.model.Users;
import com.nisum.service.UserServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.hateoas.Resource;
import org.springframework.hateoas.mvc.ControllerLinkBuilder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import static org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo;
@Slf4j
@RestController
@RequestMapping(value = "/start")
public class UserController {
public int startOffset=0;
@Autowired
UserServiceImpl userServiceImpl;
@GetMapping("/users/firstpage")
public Resource<FirstResponse> getFirstPage() {
FirstResponse fr=new FirstResponse();
log.info("Getting all Users...");
Resource<FirstResponse> resource=new Resource<>(fr);
ControllerLinkBuilder linkTo=linkTo(ControllerLinkBuilder.methodOn(this.getClass()).getAllUsers(0));
resource.add(linkTo.withRel("all_users"));
return resource;
}
@GetMapping("/users/{startOffset}")
public Users getAllUsers(@PathVariable("startOffset") int startOffset) {
return userServiceImpl.getAllUsers(startOffset);
}
}
hateoas/src/main/java/com/nisum/model/FirstResponse.java deleted 100644 → 0
View file @ 732de865
package com.nisum.model;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class FirstResponse {
private int no_of_pages=4;
}
hateoas/src/main/java/com/nisum/model/User.java deleted 100644 → 0
View file @ 732de865
package com.nisum.model;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
private int id;
private String name;
private String place;
}
hateoas/src/main/java/com/nisum/model/Users.java deleted 100644 → 0
View file @ 732de865
package com.nisum.model;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.hateoas.mvc.ControllerLinkBuilder;
import java.net.URI;
import java.util.List;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Users {
private int page_no;
private List<User> users;
private URI next;
private URI previous;
}
hateoas/src/main/java/com/nisum/service/UserService.java deleted 100644 → 0
View file @ 732de865
package com.nisum.service;
import com.nisum.model.User;
import com.nisum.model.Users;
import org.springframework.hateoas.Resource;
import java.util.List;
import java.util.Map;
public interface UserService {
List<User> getList();
Users getAllUsers(int startOffset);
}
hateoas/src/main/java/com/nisum/service/UserServiceImpl.java deleted 100644 → 0
View file @ 732de865
package com.nisum.service;
import com.nisum.constants.Constants;
import com.nisum.controller.UserController;
import com.nisum.model.User;
import com.nisum.model.Users;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.hateoas.Resource;
import org.springframework.hateoas.mvc.ControllerLinkBuilder;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.List;
import static com.nisum.constants.Constants.page_size;
import static org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo;
//Server End Code
@Service
public class UserServiceImpl implements UserService {
@Autowired
UserController userController;
private User buildUser(Integer id, String name, String place){
User user=new User(id,name,place);
return user;
}
public List<User> getList(){
List<User> UserList=new ArrayList<>();
UserList.add(buildUser(1,"Divisha","Udaipur"));
UserList.add(buildUser(2,"Ashwarya","Hyderabad"));
UserList.add(buildUser(3,"Vinit","Delhi"));
UserList.add(buildUser(4,"Deepika","Jaipur"));
UserList.add(buildUser(5,"Priyanka","Mumbai"));
UserList.add(buildUser(6,"Rahul","Pune"));
UserList.add(buildUser(7,"Dev","Bangalore"));
UserList.add(buildUser(8,"Kapil","Kochi"));
UserList.add(buildUser(9,"Sachin","Bhopal"));
UserList.add(buildUser(10,"Yuvraj","Indore"));
UserList.add(buildUser(11,"Virat","Ahmedabad"));
UserList.add(buildUser(12,"Rohit","Kozikhode"));
UserList.add(buildUser(13,"Virendra","Rohtak"));
UserList.add(buildUser(14,"Mithali","Ranchi"));
UserList.add(buildUser(15,"Shafali","Nagpur"));
UserList.add(buildUser(16,"Harmanpreet","Vishakhapatnam"));
UserList.add(buildUser(17,"Veda","Sambalpur"));
UserList.add(buildUser(18,"Smriti","Jamshedpur"));
UserList.add(buildUser(19,"Sania","Goa"));
UserList.add(buildUser(20,"Usha","Noida"));
return UserList;
}
@Override
public Users getAllUsers(int startOffset) {
int i ;
for (i = 0; i <= getList().size(); i = i + page_size) {
List<User> subList = getList().subList(startOffset, startOffset + page_size);
Users userList = new Users();
userList.setUsers(subList);
userList.setPage_no((startOffset/page_size)+1);
Resource<Users> resource = new Resource<Users>(userList);
ControllerLinkBuilder next = linkTo(ControllerLinkBuilder.methodOn(UserController.class).getAllUsers(startOffset + page_size));
ControllerLinkBuilder previous = linkTo(ControllerLinkBuilder.methodOn(UserController.class).getAllUsers(startOffset-page_size ));
if(startOffset==getList().size()-page_size) {
userList.setNext(null);
}
else {
userList.setNext(next.toUri());
}
if (startOffset == 0){
userList.setPrevious(null);
}
else
{
userList.setPrevious(previous.toUri());
}
resource.add(next.withRel("all_users"));
return userList;
}
return null;
}
}
hateoas/src/main/resources/application.yml deleted 100644 → 0
View file @ 732de865
spring:
data:
cassandra:
keyspace-name: userspace # We need to create keyspace manually from cassandra console
contact-points:
- 127.0.0.1 # IP Address where Cassandra is running
port: 9042
schema-action: create_if_not_exists
server:
port: 8080
hateoas/src/test/java/com/nisum/HateoasApplicationTests.java deleted 100644 → 0
View file @ 732de865
package com.nisum;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import org.powermock.core.classloader.annotations.PowerMockIgnore;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import java.io.IOException;
import static org.mockito.Mockito.*;
@RunWith(PowerMockRunner.class)
@PowerMockIgnore("jdk.internal.reflect.*")
@PrepareForTest({HateoasApplication.class,JSONObject.class})
public class HateoasApplicationTests {
@InjectMocks
HateoasApplication hateoasApplication;
@Mock
public JSONParser parser;
@Before()
public void setUp() throws Exception {
MockitoAnnotations.initMocks(this);
JSONObject mock = Mockito.mock(JSONObject.class);
when(hateoasApplication.getRestTemplate().getForObject(anyString(),String.class)).thenReturn(anyString());
when(parser.parse(anyString())).thenReturn(mock);
when(hateoasApplication.getJSONObject(anyString())).thenReturn(mock);
}
@Test
public void getUsingRestTemplateTest() throws IOException, ParseException {
hateoasApplication.getUsingRestTemplate();
}
@Test
public void getUsingHttpClientTest() throws IOException, ParseException {
DefaultHttpClient httpClient = mock(DefaultHttpClient.class);
HttpGet getRequest = mock(HttpGet.class);
HttpResponse httpResponse = mock(HttpResponse.class);
StatusLine statusLine = mock(StatusLine.class);
when(statusLine.getStatusCode()).thenReturn(200);
when(httpResponse.getStatusLine()).thenReturn(statusLine);
when(httpClient.execute(getRequest)).thenReturn((CloseableHttpResponse) httpResponse);
Assert.assertEquals(statusLine.getStatusCode(),200);
hateoasApplication.getUsingHttpClient();
}
@Test
public void getUsingHttpClientExceptionTest() throws IOException, ParseException {
HttpClient httpClient = mock(HttpClient.class);
HttpGet httpGet = mock(HttpGet.class);
StatusLine statusLine = mock(StatusLine.class);
when(httpClient.execute(httpGet)).thenThrow(RuntimeException.class);
Assert.assertEquals(statusLine.getStatusCode(),0);
hateoasApplication.getUsingHttpClient();
}
@Test
public void getJSONObjectTest() throws ParseException, IOException {
verify(hateoasApplication.getJSONObject(anyString()), times(4));
}
@Test
public void getJSONObjectHttpTest() throws ParseException, IOException {
verify(hateoasApplication.getJsonObjectHttp(any(HttpResponse.class),anyInt()), times(4));
}
}
src/main/java/com/nisum/Clients/HttpClient.java
View file @ c42909f5
package com.nisum.Clients;
package com.nisum.clients;
import com.nisum.HateoasApplication;
import com.nisum.constants.Constants;
import com.nisum.utils.Utils;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import org.springframework.beans.factory.annotation.Autowired;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
@Slf4j
public class HttpClient {
private static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(HttpClient.class);
@Autowired
HateoasApplication hateoasApplication;
Utils utils;
......@@ -41,15 +44,15 @@ public class HttpClient {
do {
if (i == 0) {
System.out.println(response);
obj = getJsonObjectHttp(response, 0);
hateoasApplication.saveInFile(obj, i);
obj = utils.getJsonObjectHttp(response, 0);
utils.saveInFile(obj, i);
} else {
URL url = new URL(obj.get("next").toString());
HttpGet getRequestNew = new HttpGet(url.toString());
getRequestNew.addHeader("accept", "application/json");
HttpResponse responseNew = httpClient.execute(getRequestNew);
JSONObject objnew = getJsonObjectHttp(responseNew, i);
hateoasApplication.saveInFile(objnew, i);
JSONObject objnew = utils.getJsonObjectHttp(responseNew, i);
utils.saveInFile(objnew, i);
obj = objnew;
}
i++;
......@@ -59,21 +62,14 @@ public class HttpClient {
}
}
catch(RuntimeException e){
e.getStackTrace();
logger.info("RuntimeException "+e.getStackTrace());
}
}
//Method to get a json object from the content of a get call when using httpClient
public JSONObject getJsonObjectHttp(HttpResponse response, int i) throws IOException, ParseException {
BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));
String output;
output=br.readLine();
JSONParser parser = new JSONParser();
JSONObject obj = (JSONObject) parser.parse(output);
return obj;
}
}
src/main/java/com/nisum/Clients/RestTemplateClient.java
View file @ c42909f5
package com.nisum.Clients;
package com.nisum.clients;
import com.nisum.HateoasApplication;
import com.nisum.constants.Constants;
import com.nisum.utils.Utils;
import lombok.extern.slf4j.Slf4j;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
@Slf4j
public class RestTemplateClient {
@Autowired
HateoasApplication hateoasApplication;
private static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(HttpClient.class);
@Bean
public RestTemplate getRestTemplate() {
return new RestTemplate();
}
@Autowired
Utils utils;
//using Spring Rest Template(Method 1)
public void getUsingRestTemplate() {
......@@ -33,31 +26,25 @@ public class RestTemplateClient {
JSONObject obj = null;
do {
if (i == 0) {
obj = getJSONObject(Constants.URL_EMPLOYEES);
hateoasApplication.saveInFile(obj, 0);
obj = utils.getJSONObject(Constants.URL_EMPLOYEES);
utils.saveInFile(obj, 0);
} else {
JSONObject objnew = getJSONObject(obj.get("next").toString());
hateoasApplication.saveInFile(objnew, i);
JSONObject objnew = utils.getJSONObject(obj.get("next").toString());
utils.saveInFile(objnew, i);
obj = objnew;
}
i++;
} while (i <= Constants.no_of_pages - 1);
}
catch(ParseException e){
e.getStackTrace();
logger.info("ParseException "+e.getStackTrace());
}
catch(IOException ex){
ex.getStackTrace();
logger.info("IOException "+ex.getStackTrace());
}
}
//Method to get a json object from the content of a get call when using rest template
public JSONObject getJSONObject(String URL) throws ParseException {
String result = getRestTemplate().getForObject(URL, String.class);
JSONParser parser = new JSONParser();
JSONObject obj = (JSONObject) parser.parse(result);
return obj;
}
}
src/main/java/com/nisum/HateoasApplication.java
View file @ c42909f5
package com.nisum;
import com.nisum.Clients.HttpClient;
import com.nisum.Clients.RestTemplateClient;
import com.nisum.constants.Constants;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
import java.io.*;
import java.net.URL;
@SpringBootApplication
public class HateoasApplication {
@Autowired
RestTemplateClient restTemplateClient;
@Autowired
HttpClient httpClient;
//Get Calls using 2 clients:Rest client and HttpClient
public static void main(String[] args) {
try {
SpringApplication.run(HateoasApplication.class, args);
HateoasApplication ha = new HateoasApplication();
restTemplateClient.getUsingRestTemplate();
hhttpClient.getUsingHttpClient();
} catch (ParseException e) {
e.getStackTrace();
} catch (IOException ex) {
ex.getStackTrace();
}
catch(Exception et){
et.getStackTrace();
}
}
//Method to save the json object to different files with data of each page in separate file
public void saveInFile(JSONObject jsonObject, int i) throws IOException {
BufferedWriter writer = new BufferedWriter(new FileWriter("D:\\Backup Folder\\hateoas" + (i + 1) + ".json"));
writer.newLine();
writer.write(jsonObject.toString());
writer.close();
SpringApplication.run(HateoasApplication.class, args);
}
}
......
src/main/java/com/nisum/controller/UserController.java
View file @ c42909f5
......@@ -2,29 +2,18 @@ package com.nisum.controller;
import com.nisum.model.FirstResponse;
import com.nisum.model.User;
import com.nisum.model.Users;
import com.nisum.service.UserServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.file.ConfigurationSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.hateoas.Resource;
import org.springframework.hateoas.mvc.ControllerLinkBuilder;
import org.springframework.util.StreamUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import javax.ws.rs.HttpMethod;
import javax.ws.rs.QueryParam;
import java.io.File;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import static org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo;
@Slf4j
......@@ -36,8 +25,6 @@ public class UserController {
@Autowired
UserServiceImpl userServiceImpl;
@Autowired
private RestTemplate restTemplate;
@GetMapping("/users/firstpage")
public Resource<FirstResponse> getFirstPage() {
......
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