package org.cacert.gigi.database;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map.Entry;
import java.util.Properties;
+import java.util.StringJoiner;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.cacert.gigi.database.SQLFileManager.ImportType;
public class DatabaseConnection {
+ public static final int CURRENT_SCHEMA_VERSION = 6;
+
public static final int CONNECTION_TIMEOUT = 24 * 60 * 60;
private Connection c;
private HashMap<String, PreparedStatement> statements = new HashMap<String, PreparedStatement>();
+ HashSet<PreparedStatement> underUse = new HashSet<>();
+
private static Properties credentials;
private Statement adHoc;
private void tryConnect() {
try {
- c = DriverManager.getConnection(credentials.getProperty("sql.url") + "?zeroDateTimeBehavior=convertToNull", credentials.getProperty("sql.user"), credentials.getProperty("sql.password"));
- PreparedStatement ps = c.prepareStatement("SET SESSION wait_timeout=?;");
- ps.setInt(1, CONNECTION_TIMEOUT);
- ps.execute();
- ps.close();
+ c = DriverManager.getConnection(credentials.getProperty("sql.url") + "?socketTimeout=" + CONNECTION_TIMEOUT, credentials.getProperty("sql.user"), credentials.getProperty("sql.password"));
adHoc = c.createStatement();
} catch (SQLException e) {
e.printStackTrace();
}
}
- public PreparedStatement prepare(String query) throws SQLException {
+ protected synchronized PreparedStatement prepareInternal(String query) throws SQLException {
ensureOpen();
+ query = preprocessQuery(query);
PreparedStatement statement = statements.get(query);
- if (statement == null) {
- statement = c.prepareStatement(query, Statement.RETURN_GENERATED_KEYS);
- statements.put(query, statement);
+ if (statement != null) {
+ if (underUse.add(statement)) {
+ return statement;
+ } else {
+ throw new Error("Statement in Use");
+ }
+ }
+ statement = c.prepareStatement(query, query.startsWith("SELECT ") ? Statement.NO_GENERATED_KEYS : Statement.RETURN_GENERATED_KEYS);
+ statements.put(query, statement);
+ if (underUse.add(statement)) {
+ return statement;
+ } else {
+ throw new Error("Statement in Use");
+ }
+ }
+
+ protected synchronized PreparedStatement prepareInternalScrollable(String query) throws SQLException {
+ ensureOpen();
+ query = preprocessQuery(query);
+ PreparedStatement statement = statements.get("__SCROLLABLE__! " + query);
+ if (statement != null) {
+ if (underUse.add(statement)) {
+ return statement;
+ } else {
+ throw new Error("Statement in Use");
+ }
+ }
+ statement = c.prepareStatement(query, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
+ statements.put("__SCROLLABLE__! " + query, statement);
+ if (underUse.add(statement)) {
+ return statement;
+ } else {
+ throw new Error("Statement in Use");
}
- return statement;
}
private long lastAction = System.currentTimeMillis();
lastAction = System.currentTimeMillis();
}
- public static int lastInsertId(PreparedStatement query) throws SQLException {
- ResultSet rs = query.getGeneratedKeys();
- rs.next();
- int id = rs.getInt(1);
- rs.close();
- return id;
- }
-
- private static ThreadLocal<DatabaseConnection> instances = new ThreadLocal<DatabaseConnection>() {
-
- @Override
- protected DatabaseConnection initialValue() {
- return new DatabaseConnection();
- }
- };
+ private static DatabaseConnection instance;
public static DatabaseConnection getInstance() {
- return instances.get();
+ if (instance == null) {
+ synchronized (DatabaseConnection.class) {
+ if (instance == null) {
+ instance = new DatabaseConnection();
+ }
+ }
+ }
+ return instance;
}
public static boolean isInited() {
throw new Error("Re-initiaizing is forbidden.");
}
credentials = conf;
+ int version = 0;
+ try (GigiPreparedStatement gigiPreparedStatement = new GigiPreparedStatement("SELECT version FROM \"schemeVersion\" ORDER BY version DESC LIMIT 1;")) {
+ GigiResultSet rs = gigiPreparedStatement.executeQuery();
+ if (rs.next()) {
+ version = rs.getInt(1);
+ }
+ }
+ if (version == CURRENT_SCHEMA_VERSION) {
+ return; // Good to go
+ }
+ if (version > CURRENT_SCHEMA_VERSION) {
+ throw new Error("Invalid database version. Please fix this.");
+ }
+ upgrade(version);
}
public void beginTransaction() throws SQLException {
c.setAutoCommit(false);
}
+ private static void upgrade(int version) {
+ try {
+ Statement s = getInstance().c.createStatement();
+ try {
+ while (version < CURRENT_SCHEMA_VERSION) {
+ try (InputStream resourceAsStream = DatabaseConnection.class.getResourceAsStream("upgrade/from_" + version + ".sql")) {
+ if (resourceAsStream == null) {
+ throw new Error("Upgrade script from version " + version + " was not found.");
+ }
+ SQLFileManager.addFile(s, resourceAsStream, ImportType.PRODUCTION);
+ }
+ version++;
+ }
+ s.addBatch("UPDATE \"schemeVersion\" SET version='" + version + "'");
+ System.out.println("UPGRADING Database to version " + version);
+ s.executeBatch();
+ System.out.println("done.");
+ } finally {
+ s.close();
+ }
+ } catch (SQLException e) {
+ e.printStackTrace();
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ }
+
public void commitTransaction() throws SQLException {
c.commit();
c.setAutoCommit(true);
e.printStackTrace();
}
}
+
+ public static final String preprocessQuery(String originalQuery) {
+ originalQuery = originalQuery.replace('`', '"');
+ if (originalQuery.matches("^INSERT INTO [^ ]+ SET .*")) {
+ Pattern p = Pattern.compile("INSERT INTO ([^ ]+) SET (.*)");
+ Matcher m = p.matcher(originalQuery);
+ if (m.matches()) {
+ String replacement = "INSERT INTO " + toIdentifier(m.group(1));
+ String[] parts = m.group(2).split(",");
+ StringJoiner columns = new StringJoiner(", ");
+ StringJoiner values = new StringJoiner(", ");
+ for (int i = 0; i < parts.length; i++) {
+ String[] split = parts[i].split("=", 2);
+ columns.add(toIdentifier(split[0]));
+ values.add(split[1]);
+ }
+ replacement += "(" + columns.toString() + ") VALUES(" + values.toString() + ")";
+ return replacement;
+ }
+ }
+
+ //
+ return originalQuery;
+ }
+
+ private static CharSequence toIdentifier(String ident) {
+ ident = ident.trim();
+ if ( !ident.startsWith("\"")) {
+ ident = "\"" + ident;
+ }
+ if ( !ident.endsWith("\"")) {
+ ident = ident + "\"";
+ }
+ return ident;
+ }
+
+ protected synchronized void returnStatement(PreparedStatement target) {
+ underUse.remove(target);
+ }
+
+ public void lockedStatements(PrintWriter writer) {
+ writer.println(underUse.size());
+ for (PreparedStatement ps : underUse) {
+ for (Entry<String, PreparedStatement> e : statements.entrySet()) {
+ if (e.getValue() == ps) {
+ writer.println("<br/>");
+ writer.println(e.getKey());
+ }
+ }
+ }
+ }
}
projects / gigi.git / blobdiff