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package com.cat.multi.sql;
import com.sun.istack.internal.Nullable;
import com.sun.xml.internal.rngom.parse.host.Base;
import org.apache.commons.codec.binary.Base64;
import javax.swing.*;
import java.io.File;
import java.sql.*;
import java.util.HashSet;
import java.util.Set;
/**
* Created by cat on 2018/1/28.
* db sql
*/
public class DaoManager {
private static final boolean SHOW_SQL = false;
private static final boolean SHOW_WARING = false;
private static final String DB_NAME = "multiThreads.sqlite";
private static final String TABLE_NAME = "url2destPath";
private static final String COLUMN_URL = "URL";
private static final String COLUMN_DEST_PATH = "DEST_PATH";
private static final String COLUMN_KW_ARGS = "KW_ARGS";
;
static Connection openDbConnection(String dbName) {
Connection c = null;
try {
Class.forName("org.sqlite.JDBC");
// jdbc:sqlite:{file::identifier.sqlite}?
if (!dbName.endsWith(".sqlite")) {
dbName = dbName + ".sqlite";
}
c = DriverManager.getConnection("jdbc:sqlite:raw/db/" + dbName);
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
throw new RuntimeException(e);
}
// never close connection here
return c;
}
public static Connection openDbConnection() {
return openDbConnection(DB_NAME);
}
public static boolean createTable() {
Connection c = null;
Statement stmt = null;
try {
c = openDbConnection();
stmt = c.createStatement();
String sql = String.format("CREATE TABLE IF NOT EXISTS %s " +
"(%s CHAR(500) PRIMARY KEY NOT NULL,%s CHAR(300) NOT NULL,%s CHAR(400))",
TABLE_NAME, COLUMN_URL, COLUMN_DEST_PATH, COLUMN_KW_ARGS);
if (SHOW_SQL) {
System.out.println("create table sql=" + sql);
}
stmt.executeUpdate(sql);
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
try {
if (stmt != null) {
stmt.cancel();
}
} catch (SQLException e1) {
e1.printStackTrace();
}
throw new RuntimeException(e);
} finally {
try {
if (stmt != null)
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (c != null)
c.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return true;
}
public static boolean dropTable() {
Connection c = null;
Statement stmt = null;
try {
c = openDbConnection();
stmt = c.createStatement();
String sql = String.format("DROP TABLE %s;", TABLE_NAME);
if (SHOW_SQL) {
System.out.println("drop table sql=" + sql);
}
return stmt.execute(sql);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 没有输入
*
* @return 返回的是解码后的数据
*/
public static Set<UriBean> select() {
String sql = String.format("SELECT * FROM %s;", TABLE_NAME);
if (SHOW_SQL) {
System.out.println("select sql=" + sql);
}
HashSet<UriBean> beanArrayList = new HashSet<>();
Connection c = null;
Statement stmt = null;
ResultSet rs = null;
try {
c = openDbConnection();
c.setAutoCommit(false);
stmt = c.createStatement();
rs = stmt.executeQuery(sql);
//noinspection Duplicates
while (rs.next()) {
String url = rs.getString("URL");
String destPath = rs.getString("DEST_PATH");
UriBean bean = new UriBean(decode(url), decode(destPath));
beanArrayList.add(bean);
}
} catch (Exception e) {
beanArrayList.clear();
throw new RuntimeException(e);
} finally {
try {
if (rs != null) {
rs.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (stmt != null) {
stmt.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (c != null) {
c.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return beanArrayList;
}
/**
* 拿到的是一个未加密的 url
*
* @param key url
* @return 未加密的 destPath
*/
@Nullable
public static String select(String key) {
if (!Base64.isBase64(key)) {
key = encode(key);
}
HashSet<UriBean> beanArrayList = new HashSet<>();
Connection c = null;
Statement stmt = null;
ResultSet rs = null;
try {
c = openDbConnection();
c.setAutoCommit(false);
stmt = c.createStatement();
String sql = String.format("SELECT * FROM %s WHERE %s = \"%s\";", TABLE_NAME, COLUMN_URL, key);
if (SHOW_SQL) {
System.out.println("select sql:" + sql);
}
rs = stmt.executeQuery(sql);
//noinspection Duplicates
while (rs.next()) {
String url = rs.getString("URL");
String destPath = rs.getString("DEST_PATH");
if (Base64.isBase64(url)) {
url = decode(url);
}
if (Base64.isBase64(destPath)) {
destPath = decode(destPath);
}
UriBean bean = new UriBean(url, destPath);
beanArrayList.add(bean);
}
if (beanArrayList.size() == 1) {
return beanArrayList.stream().findFirst().get().getDestPah();
} else {
return null;
}
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
throw new RuntimeException(e);
} finally {
try {
if (rs != null) {
rs.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (stmt != null) {
stmt.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (c != null) {
c.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
/**
* 拿到 url， 会进行内部转码
*
* @param url URL
* @param destPath path
* @return insert
*/
public static int insert(String url, String destPath) {
return insert(new UriBean(url, destPath));
}
public static int insert(UriBean bean) {
createTable();
String key = bean.getUrl();
String value = bean.getDestPah();
if (!Base64.isBase64(key)) {
key = encode(key);
}
if (!Base64.isBase64(value)) {
value = encode(value);
}
String sql = String.format("INSERT INTO %s (%s,%s) VALUES(\"%s\",\"%s\");", TABLE_NAME, COLUMN_URL, COLUMN_DEST_PATH,
key, value);
if (SHOW_SQL) {
System.out.println("insert sqlOrigin=" + String.format("INSERT INTO %s (%s,%s) VALUES(\"%s\",\"%s\");", TABLE_NAME, COLUMN_URL, COLUMN_DEST_PATH,
decode(key), decode(value)));
System.out.println("insert sql=" + sql);
}
String select = select(key);
if (select != null) {
if (SHOW_WARING) {
System.err.println("this key has already insert: " + bean);
}
return -1;
}
Connection c = null;
Statement stmt = null;
int ret = -1;
try {
c = openDbConnection();
c.setAutoCommit(false);
stmt = c.createStatement();
ret = stmt.executeUpdate(sql);
c.commit();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
throw new RuntimeException(e);
} finally {
try {
if (stmt != null) {
stmt.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (c != null) {
c.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return ret;
}
public static int update(String key, String value) {
if (!Base64.isBase64(key)) {
key = encode(key);
}
if (!Base64.isBase64(value)) {
value = encode(value);
}
Connection c = null;
Statement stmt = null;
int ret = -1;
try {
c = openDbConnection();
c.setAutoCommit(false);
stmt = c.createStatement();
String sql = String.format("UPDATE %s set %s=%s where %s=%s;",
TABLE_NAME, COLUMN_DEST_PATH, value, COLUMN_URL, key);
if (SHOW_SQL) {
System.out.println("update sql==" + sql);
}
ret = stmt.executeUpdate(sql);
c.commit();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
System.exit(0);
} finally {
try {
if (stmt != null) {
stmt.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (c != null) {
c.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return ret;
}
public static int delete(String key) {
if (!Base64.isBase64(key)) {
key = encode(key);
}
Connection c = null;
Statement stmt = null;
int ret = -1;
try {
c = openDbConnection();
c.setAutoCommit(false);
stmt = c.createStatement();
String sql = String.format("DELETE from %s where %s=\"%s\";", TABLE_NAME, COLUMN_URL, key);
if (SHOW_SQL) {
System.out.println("delete sql=" + sql);
}
ret = stmt.executeUpdate(sql);
c.commit();
String select = select(key);
if (ret > 0 && select != null) {
boolean delete = new File(select).delete();
System.err.println(delete + "删除 索引时，对应删除关联的文件：" + select);
}
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
throw new RuntimeException(e);
} finally {
try {
if (stmt != null) {
stmt.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (c != null) {
c.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return ret;
}
/**
* uri 必须转码 https:// 这个中间的 : 会导致sql 语法错误。
*
* @param src uri
* @return normal str
*/
private static String encode(String src) {
if (Base64.isBase64(src)) {
return src;
}
return Base64.encodeBase64URLSafeString(src.getBytes());
}
private static String decode(String src) {
if (Base64.isBase64(src)) {
return new String(org.apache.commons.codec.binary.Base64.decodeBase64(src));
} else {
return src;
}
}
public static void show() {
Set<UriBean> select = select();
System.out.println("### show ---> start");
for (UriBean bean : select) {
System.out.println(bean);
}
System.out.println("### show <--- end##");
}
}