Spirin [group 597] - Task 4

homework-g597-spirin/pom.xml

@@ -11,6 +11,10 @@
 
     <artifactId>homework-g597-spirin</artifactId>
 
+    <properties>
+        <spring.boot.version>1.4.2.RELEASE</spring.boot.version>
+    </properties>
+
     <dependencies>
         <dependency>
             <groupId>ru.mipt.java2016</groupId>
@@ -30,6 +34,40 @@
             <artifactId>guava</artifactId>
             <version>20.0</version>
         </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+            <version>${spring.boot.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+            <version>${spring.boot.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+            <version>${spring.boot.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.zaxxer</groupId>
+            <artifactId>HikariCP</artifactId>
+            <version>2.5.1</version>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>1.4.193</version>
+        </dependency>
+
+        <dependency>
+            <groupId>ru.mipt.java2016</groupId>
+            <artifactId>homework-tests</artifactId>
+            <version>1.0.0</version>
+            <scope>test</scope>
+        </dependency>
+
     </dependencies>
 
 </project>

homework-g597-spirin/src/main/java/ru/mipt/java2016/homework/g597/spirin/task4/Application.java

@@ -0,0 +1,39 @@
+package ru.mipt.java2016.homework.g597.spirin.task4;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.Banner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+import ru.mipt.java2016.homework.base.task1.Calculator;
+
+/**
+ * Created by whoami on 12/13/16.
+ */
+
+@EnableAutoConfiguration
+@Configuration
+@ComponentScan(basePackageClasses = Application.class)
+public class Application {
+
+    @Bean
+    public Calculator calculator() {
+        return new Evaluator();
+    }
+
+    @Bean
+    public EmbeddedServletContainerCustomizer customizer(
+            @Value("${ru.mipt.java2016.homework.g597.spirin.task4.httpPort:9001}") int port) {
+        return container -> container.setPort(port);
+    }
+
+    public static void main(String[] args) {
+        SpringApplication application = new SpringApplication(Application.class);
+        application.setBannerMode(Banner.Mode.OFF);
+        application.run(args);
+    }
+}

homework-g597-spirin/src/main/java/ru/mipt/java2016/homework/g597/spirin/task4/BillingDao.java

@@ -0,0 +1,163 @@
+package ru.mipt.java2016.homework.g597.spirin.task4;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.dao.EmptyResultDataAccessException;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.stereotype.Repository;
+
+import javax.annotation.PostConstruct;
+import javax.sql.DataSource;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.List;
+
+/**
+ * Created by whoami on 12/13/16.
+ */
+
+@Repository
+public class BillingDao {
+    private static final Logger LOG = LoggerFactory.getLogger(BillingDao.class);
+
+    @Autowired
+    private DataSource dataSource;
+
+    private JdbcTemplate jdbcTemplate;
+
+    @PostConstruct
+    public void postConstruct() {
+        jdbcTemplate = new JdbcTemplate(dataSource, false);
+        initSchema();
+    }
+
+    public void initSchema() {
+        LOG.info("Initializing schema");
+        jdbcTemplate.execute("CREATE SCHEMA IF NOT EXISTS billing");
+
+        // User table
+        jdbcTemplate.execute("CREATE TABLE IF NOT EXISTS billing.users " +
+                "(username VARCHAR PRIMARY KEY, password VARCHAR)");
+
+        // Update initial (username, password)
+        jdbcTemplate.execute("DELETE FROM billing.users WHERE username = 'username'");
+        jdbcTemplate.execute("INSERT INTO billing.users VALUES ('username', 'password')");
+
+        // Variable table
+        jdbcTemplate.execute("CREATE TABLE IF NOT EXISTS billing.variables " +
+                "(username VARCHAR, variable VARCHAR, value FLOAT)");
+
+        // Function table
+        jdbcTemplate.execute("CREATE TABLE IF NOT EXISTS billing.functions " +
+                "(username VARCHAR, function VARCHAR, arity INTEGER, body VARCHAR)");
+    }
+
+    // Load user from user table
+    public BillingUser loadUser(String username) throws EmptyResultDataAccessException {
+        LOG.info("Querying for user " + username);
+        return jdbcTemplate.queryForObject(
+                "SELECT username, password FROM billing.users WHERE username = ?",
+                new Object[]{username},
+                new RowMapper<BillingUser>() {
+                    @Override
+                    public BillingUser mapRow(ResultSet rs, int rowNum) throws SQLException {
+                        return new BillingUser(
+                                rs.getString("username"),
+                                rs.getString("password")
+                        );
+                    }
+                }
+        );
+    }
+
+    // Put user into user table
+    public void putUser(String username, String password) {
+        LOG.info("Putting user (username, password) into table");
+        jdbcTemplate.execute("INSERT INTO billing.users VALUES ('"
+                + username + "', '" + password + "')");
+    }
+
+    // Get value of variable of particular user
+    public Double getVariable(String username, String variable) throws EmptyResultDataAccessException {
+        LOG.info("Querying for variable " + variable + " of user " + username);
+        return jdbcTemplate.queryForObject(
+                "SELECT value FROM billing.variables WHERE username = '" + username +
+                        "' AND variable = '" + variable + "'",
+                new Double[]{},
+                new RowMapper<Double>() {
+                    @Override
+                    public Double mapRow(ResultSet rs, int rowNum) throws SQLException {
+                        return new Double(
+                                rs.getString("value").toString()
+                        );
+                    }
+                }
+        );
+    }
+
+    // Put variable of particular user
+    public void putVariable(String username, String variable, Double value) {
+        LOG.info("Putting variable " + variable + " of user " + username);
+        deleteVariable(username, variable);
+        jdbcTemplate.execute("INSERT INTO billing.variables VALUES ('"
+                + username + "', '" + variable + "', " + value.toString() + ")");
+    }
+
+    // Delete variable of particular user
+    public void deleteVariable(String username, String variable) {
+        LOG.info("Deleting variable " + variable + " of user " + username);
+        jdbcTemplate.execute("DELETE FROM billing.variables WHERE username = '"
+                + username + "' AND variable = '" + variable + "'");
+    }
+
+    // Get all variables from the service of particular user
+    public String[] getAllVariables(String username) {
+        LOG.info("Querying for all variables of user " + username);
+
+        List queryResult = jdbcTemplate.queryForList(
+                "SELECT variable FROM billing.variables WHERE username = '" +
+                        username + "'");
+
+        String[] variables = new String[queryResult.size()];
+
+        for (int i = 0; i < queryResult.size(); ++i) {
+            variables[i] = queryResult.get(i).toString();
+        }
+
+        return variables;
+    }
+
+    // Get function of particular user
+    public String getFunction(String username, String function) {
+        LOG.info("Querying for function " + function + " of user " + username);
+        return jdbcTemplate.queryForObject(
+                "SELECT body FROM billing.functions WHERE username = '" + username +
+                        "' AND function = '" + function + "'",
+                new String[]{},
+                new RowMapper<String>() {
+                    @Override
+                    public String mapRow(ResultSet rs, int rowNum) throws SQLException {
+                        return rs.getString("body");
+                    }
+                }
+        );
+    }
+
+    // Put function of particular user
+    public void putFunction(String username, String function, Integer arity, String body) {
+        LOG.info("Putting function " + function + " of user " + username);
+        deleteFunction(username, function);
+        jdbcTemplate.execute("INSERT INTO billing.functions VALUES ('"
+                + username + "', '" + function + "', " + arity.toString() + ", '"
+                + body + "')");
+    }
+
+    // Delete function of particular user
+    public void deleteFunction(String username, String function) {
+        LOG.info("Deleting function " + function + " of user " + username);
+        jdbcTemplate.execute("DELETE FROM billing.functions WHERE username = '" +
+                username + "' AND function = '" + function + "'");
+    }
+}

homework-g597-spirin/src/main/java/ru/mipt/java2016/homework/g597/spirin/task4/BillingDatabaseConfiguration.java

@@ -0,0 +1,30 @@
+package ru.mipt.java2016.homework.g597.spirin.task4;
+
+import com.zaxxer.hikari.HikariConfig;
+import com.zaxxer.hikari.HikariDataSource;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import javax.sql.DataSource;
+
+/**
+ * Created by whoami on 12/13/16.
+ */
+
+@Configuration
+public class BillingDatabaseConfiguration {
+    @Bean
+    public DataSource billingDataSource(
+            @Value("jdbc:h2:mem:testdb") String jdbcUrl,
+            @Value("${ru.mipt.java2016.homework.g597.spirin.task4.username:}") String username,
+            @Value("${ru.mipt.java2016.homework.g597.spirin.task4.password:}") String password
+    ) {
+        HikariConfig config = new HikariConfig();
+        config.setDriverClassName(org.h2.Driver.class.getName());
+        config.setJdbcUrl(jdbcUrl);
+        config.setUsername(username);
+        config.setPassword(password);
+        return new HikariDataSource(config);
+    }
+}

homework-g597-spirin/src/main/java/ru/mipt/java2016/homework/g597/spirin/task4/BillingUser.java

@@ -0,0 +1,63 @@
+package ru.mipt.java2016.homework.g597.spirin.task4;
+
+/**
+ * Created by whoami on 12/13/16.
+ */
+
+public class BillingUser {
+    private final String username;
+    private final String password;
+
+    public BillingUser(String username, String password) {
+        if (username == null) {
+            throw new IllegalArgumentException("Null username is not allowed");
+        }
+        if (password == null) {
+            throw new IllegalArgumentException("Null password is not allowed");
+        }
+        this.username = username;
+        this.password = password;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    @Override
+    public String toString() {
+        return "BillingUser{" +
+                "username='" + username + '\'' +
+                ", password='" + password + '\'' +
+                '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+
+        BillingUser that = (BillingUser) o;
+
+        if (!username.equals(that.username)) {
+            return false;
+        }
+        return password.equals(that.password);
+
+    }
+
+    @Override
+    public int hashCode() {
+        int result = username.hashCode();
+        result = 31 * result + password.hashCode();
+        return result;
+    }
+}
+