g599.Kupriyanov.4th-task

homework-g596-kupriyanov/pom.xml

@@ -11,6 +11,10 @@
 
     <artifactId>homework-g596-kupriyanov</artifactId>
 
+    <properties>
+        <spring.boot.version>1.4.2.RELEASE</spring.boot.version>
+    </properties>
+
     <dependencies>
         <dependency>
             <groupId>ru.mipt.java2016</groupId>
@@ -24,6 +28,49 @@
             <version>1.0.0</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-jar-plugin</artifactId>
+            <version>2.3.2</version>
+        </dependency>
+        <dependency>
+            <groupId>ru.mipt.java2016</groupId>
+            <artifactId>homework-base</artifactId>
+            <version>1.0.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>net.sourceforge.jeval</groupId>
+            <artifactId>jeval</artifactId>
+            <version>0.9.4</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>
+
     </dependencies>
 
 </project>

homework-g596-kupriyanov/src/main/java/ru/mipt/java2016/homework/g596/kupriyanov/task4/BillingDao.java

@@ -0,0 +1,202 @@
+package ru.mipt.java2016.homework.g596.kupriyanov.task4;
+
+/**
+ * Created by Artem Kupriyanov on 17/12/2016.
+ */
+
+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 ru.mipt.java2016.homework.base.task1.ParsingException;
+
+import javax.annotation.PostConstruct;
+import javax.sql.DataSource;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.HashMap;
+
+@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.trace("Initializing schema");
+        jdbcTemplate.execute("CREATE SCHEMA IF NOT EXISTS billing");
+
+        // ЗДЕСЬ ДОЛЖНА БЫТЬ ХОРОШАЯ РЕАЛИЗАЦИЯ БАЗЫ ДАННЫХ
+        // Users table
+        jdbcTemplate.execute("CREATE TABLE IF NOT EXISTS billing.users " +
+                "(username VARCHAR PRIMARY KEY, password VARCHAR, enabled BOOLEAN)");
+        jdbcTemplate.update("INSERT INTO billing.users VALUES (\'username\', \'password\', TRUE)");
+
+        // Variable table
+        jdbcTemplate.execute("CREATE TABLE IF NOT EXISTS billing.variables " +
+                "(username VARCHAR, variable VARCHAR, val DOUBLE)");
+
+        // Functions table
+        jdbcTemplate.execute("CREATE TABLE IF NOT EXISTS billing.functions " +
+                "(username VARCHAR, function VARCHAR, arity INTEGER, body VARCHAR)");
+    }
+
+    private Boolean checkNull(String condition) {
+        LOG.trace("check " + condition);
+        String allSelect = "SELECT * FROM " + condition;
+        return jdbcTemplate.queryForObject(
+                allSelect,
+                new Object[]{},
+                new RowMapper<Boolean>() {
+                    @Override
+                    public Boolean mapRow(ResultSet rs, int rowNum) throws SQLException {
+                        Boolean flag = false;
+                        while (true) {
+                            if (!rs.next()) {
+                                break;
+                            }
+                            flag = true;
+                        }
+                        return flag;
+                    }
+                }
+        );
+    }
+
+    public BillingUser loadUser(String username) throws EmptyResultDataAccessException {
+        LOG.trace("Querying for user " + username);
+        return jdbcTemplate.queryForObject(
+                "SELECT username, password, enabled 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"),
+                                rs.getBoolean("enabled")
+                        );
+                    }
+                }
+        );
+    }
+
+    public void putUser(String username, String password) {
+        try {
+            loadUser(username);
+        } catch (EmptyResultDataAccessException e) {
+            jdbcTemplate.execute("INSERT INTO billing.users VALUES (\'" + username + "\', \'" + password + "\', TRUE)");
+        }
+    }
+
+    public Double getVariable(String username, String variable) {
+        LOG.trace("Get variable " + username + " variable " + variable);
+        try {
+            return jdbcTemplate.queryForObject(
+                    "select val 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("val").toString()
+                            );
+                        }
+                    }
+            );
+        } catch (EmptyResultDataAccessException e) {
+            return 0.0;
+        }
+    }
+
+    public void putVariable(String username, String variable, Double value) {
+        LOG.trace("Put variable " + variable + " for user " + username);
+        try {
+            deleteVariable(username, variable);
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            jdbcTemplate.execute("INSERT INTO billing.variables VALUES (\'"
+                    + username + "\', \'" + variable + "\', " + value.toString() + ")");
+        }
+    }
+
+    public void deleteVariable(String username, String variable) {
+        LOG.trace("Delete variable " + variable + "for user " + username);
+        jdbcTemplate.execute("DELETE FROM billing.variables WHERE username = \'"
+                + username + "\' AND variable = \'" + variable + "\'");
+    }
+
+    public HashMap<String, String> getAllVariables(String username) throws ParsingException {
+        LOG.trace("List with all functions for user: " + username);
+        try {
+            return jdbcTemplate.queryForObject(
+                    "SELECT username, variable, val FROM billing.variables WHERE username = ?",
+                    new Object[]{username},
+                    new RowMapper<HashMap<String, String>>() {
+                        @Override
+                        public HashMap<String, String> mapRow(ResultSet rs, int rowNum) throws SQLException {
+                            HashMap<String, String> tmp = new HashMap<String, String>();
+                            while (true) {
+                                tmp.put(rs.getString("variable"), Double.toString(rs.getDouble("val")));
+                                if (!rs.next()) {
+                                    break;
+                                }
+                            }
+                            return tmp;
+                        }
+                    }
+            );
+        } catch (EmptyResultDataAccessException e) {
+            HashMap<String, String> tmp = new HashMap<String, String>();
+            return tmp;
+        }
+    }
+
+    public void putFunction(String username, String function, Integer arity, String body) {
+        LOG.trace("Put function " + function + " for user " + username);
+        try {
+            deleteFunction(username, function);
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            jdbcTemplate.execute("INSERT INTO billing.functions VALUES (\'"
+                    + username + "\', \'" + function + "\', " + arity.toString() + ", \'"
+                    + body + "\')");
+        }
+    }
+
+    public String getFunction(String username, String function) {
+        LOG.trace("Load function " + function + " for 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");
+                    }
+                }
+        );
+    }
+
+    public void deleteFunction(String username, String function) {
+        LOG.info("Delete function " + function + " for user " + username);
+        jdbcTemplate.execute("DELETE FROM billing.functions WHERE username = \'" +
+                username + "\' AND function = \'" + function + "\'");
+    }
+}

homework-g596-kupriyanov/src/main/java/ru/mipt/java2016/homework/g596/kupriyanov/task4/BillingDatabaseConfiguration.java

@@ -0,0 +1,30 @@
+package ru.mipt.java2016.homework.g596.kupriyanov.task4;
+
+/**
+ * Created by Artem Kupriyanov on 17/12/2016.
+ */
+
+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;
+
+@Configuration
+public class BillingDatabaseConfiguration {
+    @Bean
+    public DataSource billingDataSource(
+            @Value("${ru.mipt.java2016.homework.g000.lavrentyev.task4.jdbcUrl}") String jdbcUrl,
+            @Value("${ru.mipt.java2016.homework.g000.lavrentyev.task4.username:}") String username,
+            @Value("${ru.mipt.java2016.homework.g000.lavrentyev.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-g596-kupriyanov/src/main/java/ru/mipt/java2016/homework/g596/kupriyanov/task4/BillingUser.java

@@ -0,0 +1,73 @@
+package ru.mipt.java2016.homework.g596.kupriyanov.task4;
+
+/**
+ * Created by Artem Kupriyanov on 17/12/2016.
+ */
+
+public class BillingUser {
+    private final String username;
+    private final String password;
+    private final boolean enabled;
+
+    public BillingUser(String username, String password, boolean enabled) {
+        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;
+        this.enabled = enabled;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    @Override
+    public String toString() {
+        return "BillingUser{" +
+                "username='" + username + '\'' +
+                ", password='" + password + '\'' +
+                ", enabled=" + enabled +
+                '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+
+        BillingUser that = (BillingUser) o;
+
+        if (enabled != that.enabled) {
+            return false;
+        }
+        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();
+        result = 31 * result + (enabled ? 1 : 0);
+        return result;
+    }
+}