Assignment-5 of developer training guid

tutorials/Assignment-5/README.md

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+Run the services and all the necessary dependencies and figure out why desired response is not returned. Clear out any previously added configuration files(such as indexer.yml, persister.yml etc) and add the files present in this assignment.

tutorials/Assignment-5/btr-calculator/README.md

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+# BTR Calculator
+
+This module calculates the birth registration application
+charges and creates bill for the application.
+
+### Service Dependencies
+- egov-mdms
+- billing service
+
+## Service Details
+
+The service generates demand based on input amount from
+mdms.
+
+### API Details
+
+`BasePath` /birth-calculator/v1/[API endpoint]
+
+#### Method
+
+a) `_calculate`
+- Calculates the amount due and generates the demand.
+
+b) `_getbill`
+- Fetches the bill for given application number.

tutorials/Assignment-5/btr-calculator/pom.xml

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+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.egov</groupId>
+    <artifactId>birth-calculator</artifactId>
+    <packaging>jar</packaging>
+    <name>birth-calculator</name>
+    <version>1.0.0</version>
+    <properties>
+        <java.version>1.8</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+    </properties>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.2.6.RELEASE</version>
+    </parent>
+    <build>
+        <sourceDirectory>src/main/java</sourceDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>repackage</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>io.swagger</groupId>
+            <artifactId>swagger-core</artifactId>
+            <version>1.5.18</version>
+        </dependency>
+        <!-- Egov dependencies -->
+        <dependency>
+            <groupId>org.egov.services</groupId>
+            <artifactId>tracer</artifactId>
+            <version>2.0.0-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>org.egov.services</groupId>
+            <artifactId>services-common</artifactId>
+            <version>1.0.1-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>org.egov.services</groupId>
+            <artifactId>digit-models</artifactId>
+            <version>1.0.0-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>org.egov</groupId>
+            <artifactId>mdms-client</artifactId>
+            <version>0.0.2-SNAPSHOT</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-jsr310</artifactId>
+        </dependency>
+        <!-- Bean Validation API support -->
+        <dependency>
+            <groupId>javax.validation</groupId>
+            <artifactId>validation-api</artifactId>
+        </dependency>
+    </dependencies>
+    <repositories>
+        <repository>
+            <id>repo.egovernments.org</id>
+            <name>eGov ERP Releases Repository</name>
+            <url>https://nexus-repo.egovernments.org/nexus/content/repositories/releases/</url>
+        </repository>
+        <repository>
+            <id>repo.egovernments.org.snapshots</id>
+            <name>eGov ERP Releases Repository</name>
+            <url>https://nexus-repo.egovernments.org/nexus/content/repositories/snapshots/</url>
+        </repository>
+        <repository>
+            <id>repo.egovernments.org.public</id>
+            <name>eGov Public Repository Group</name>
+            <url>https://nexus-repo.egovernments.org/nexus/content/groups/public/</url>
+        </repository>
+        <repository>
+            <id>repo.digit.org</id>
+            <name>eGov DIGIT Releases Repository</name>
+            <url>https://nexus-repo.digit.org/nexus/content/repositories/snapshots/</url>
+        </repository>
+    </repositories>
+</project>

tutorials/Assignment-5/btr-calculator/src/main/java/digit/Main.java

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+package digit;
+
+
+import org.egov.tracer.config.TracerConfiguration;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Import;
+
+@Import({TracerConfiguration.class})
+@SpringBootApplication
+@ComponentScan(basePackages = {"digit", "digit.web.controllers", "digit.config"})
+public class Main {
+
+
+    public static void main(String[] args) throws Exception {
+        SpringApplication.run(Main.class, args);
+    }
+
+}

tutorials/Assignment-5/btr-calculator/src/main/java/digit/config/BTRCalculatorConfigs.java

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+package digit.config;
+
+import lombok.Getter;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@Getter
+public class BTRCalculatorConfigs {
+
+    @Value("${egov.billingservice.host}")
+    private String billingServiceHost;
+
+    @Value("${egov.demand.create.endpoint}")
+    private String demandCreateEndpoint;
+
+    @Value("${egov.billingservice.fetch.bill}")
+    private String fetchBillEndpoint;
+
+    @Value("${btr.taxhead.master.code}")
+    private String taxHeadMasterCode;
+
+    @Value("${btr.module.code}")
+    private String moduleCode;
+
+}

tutorials/Assignment-5/btr-calculator/src/main/java/digit/config/MainConfiguration.java

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+package digit.config;
+
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.egov.tracer.config.TracerConfiguration;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Import;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+
+import javax.annotation.PostConstruct;
+import java.util.TimeZone;
+
+
+@Import({TracerConfiguration.class})
+public class MainConfiguration {
+
+    @Value("${app.timezone}")
+    private String timeZone;
+
+    @PostConstruct
+    public void initialize() {
+        TimeZone.setDefault(TimeZone.getTimeZone(timeZone));
+    }
+
+    @Bean
+    public ObjectMapper objectMapper() {
+        return new ObjectMapper().disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES).setTimeZone(TimeZone.getTimeZone(timeZone));
+    }
+
+    @Bean
+    @Autowired
+    public MappingJackson2HttpMessageConverter jacksonConverter(ObjectMapper objectMapper) {
+        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
+        converter.setObjectMapper(objectMapper);
+        return converter;
+    }
+}

tutorials/Assignment-5/btr-calculator/src/main/java/digit/repository/ServiceRequestRepository.java

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+package digit.repository;
+
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import lombok.extern.slf4j.Slf4j;
+import org.egov.tracer.model.ServiceCallException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+import org.springframework.web.client.HttpClientErrorException;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.Map;
+
+@Repository
+@Slf4j
+public class ServiceRequestRepository {
+
+    private final ObjectMapper mapper;
+
+    private final RestTemplate restTemplate;
+
+
+    @Autowired
+    public ServiceRequestRepository(ObjectMapper mapper, RestTemplate restTemplate) {
+        this.mapper = mapper;
+        this.restTemplate = restTemplate;
+    }
+
+
+    public Object fetchResult(StringBuilder uri, Object request) {
+        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
+        Object response = null;
+        try {
+            response = restTemplate.postForObject(uri.toString(), request, Map.class);
+        } catch (HttpClientErrorException e) {
+            log.error("External Service threw an Exception: ", e);
+            throw new ServiceCallException(e.getResponseBodyAsString());
+        } catch (Exception e) {
+            log.error("Exception while fetching from searcher: ", e);
+        }
+
+        return response;
+    }
+}

tutorials/Assignment-5/btr-calculator/src/main/java/digit/service/CalculationService.java

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+package digit.service;
+
+import digit.util.MdmsUtil;
+import digit.util.ResponseInfoFactory;
+import digit.web.models.Calculation;
+import digit.web.models.CalculationCriteria;
+import digit.web.models.CalculationReq;
+import digit.web.models.CalculationRes;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.LinkedList;
+import java.util.List;
+
+@Service
+public class CalculationService {
+
+    @Autowired
+    private MdmsUtil mdmsUtil;
+
+    @Autowired
+    private ResponseInfoFactory responseInfoFactory;
+
+    @Autowired
+    private DemandService demandService;
+
+    public List<Calculation> calculate(CalculationReq calculationReq){
+        List<Calculation> calculations = getCalculations(calculationReq);
+        CalculationRes calculationRes = CalculationRes.builder().responseInfo(responseInfoFactory.createResponseInfoFromRequestInfo(calculationReq.getRequestInfo(),true)).calculation(calculations).build();
+
+        demandService.generateDemands(calculationReq.getRequestInfo(),calculations);
+        return calculations;
+    }
+
+    public List<Calculation> getCalculations(CalculationReq calculationReq){
+        List<Calculation> calculations = new LinkedList<>();
+        for(CalculationCriteria calculationCriteria : calculationReq.getCalculationCriteria()) {
+            Calculation calculation = new Calculation();
+            calculation.setApplicationNumber(calculationCriteria.getApplicationNumber());
+            calculation.setTenantId(calculationCriteria.getTenantId());
+            calculation.setTotalAmount(Double.valueOf(getAmount(calculationReq)));
+            calculations.add(calculation);
+        }
+        return calculations;
+    }
+
+    private Integer getAmount(CalculationReq calculationReq) {
+        return mdmsUtil.fetchRegistrationChargesFromMdms(calculationReq.getRequestInfo(), calculationReq.getCalculationCriteria().get(0).getTenantId());
+    }
+
+}