org.threadly.db.AbstractErrorSqlConnection Maven / Gradle / Ivy
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package org.threadly.db;
import java.sql.Array;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.NClob;
import java.sql.PreparedStatement;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Savepoint;
import java.sql.Statement;
import java.sql.Struct;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.Executor;
import org.threadly.concurrent.DoNothingRunnable;
import org.threadly.util.ArgumentVerifier;
/**
* Implementation of {@link Connection} which is perpetually in a state of error. Any operation on
* this connection will result in an exception being thrown.
*
* The connection will appear valid (from {@link #isValid(int)} and non-closed UNTIL the exception
* is thrown. After that point the connection will appear as if it was closed.
*
* @since 0.10
*/
abstract class AbstractErrorSqlConnection implements Connection {
private final Runnable errorThrownListener;
private final SQLException sqlError;
private final RuntimeException runtimeError;
private volatile boolean closed = false;
private volatile boolean errorThrown = false;
/**
* Construct a new {@link AbstractErrorSqlConnection}.
*
* @param errorThrownListener Listener to be invoked when error is realized (ie thrown)
* @param error Error to throw once Connection is attempted to be used
*/
public AbstractErrorSqlConnection(Runnable errorThrownListener, SQLException error) {
ArgumentVerifier.assertNotNull(error, "error");
if (errorThrownListener == null) {
errorThrownListener = DoNothingRunnable.instance();
}
this.errorThrownListener = errorThrownListener;
this.sqlError = error;
this.runtimeError = null;
}
/**
* Construct a new {@link AbstractErrorSqlConnection}.
*
* @param errorThrownListener Listener to be invoked when error is realized (ie thrown)
* @param error Error to throw once Connection is attempted to be used
*/
public AbstractErrorSqlConnection(Runnable errorThrownListener, RuntimeException error) {
ArgumentVerifier.assertNotNull(error, "error");
if (errorThrownListener == null) {
errorThrownListener = DoNothingRunnable.instance();
}
this.errorThrownListener = errorThrownListener;
this.sqlError = null;
this.runtimeError = error;
}
protected SQLException error() throws SQLException {
errorThrown = true;
errorThrownListener.run();
if (sqlError != null) {
throw new SQLException(sqlError);
} else {
throw new SQLException(runtimeError);
}
}
@Override
public void close() {
closed = true;
}
@Override
public boolean isClosed() {
return errorThrown || closed;
}
@Override
public void setClientInfo(Properties arg0) throws SQLClientInfoException {
// ignored
}
@Override
public void setClientInfo(String arg0, String arg1) throws SQLClientInfoException {
// ignored
}
@Override
public void clearWarnings() throws SQLException {
// ignored
}
// set operations ignored as the state of this connection does not matter
@Override
public void setAutoCommit(boolean arg0) throws SQLException {
// ignored
}
@Override
public void setCatalog(String arg0) throws SQLException {
// ignored
}
@Override
public void setHoldability(int arg0) throws SQLException {
// ignored
}
@Override
public void setNetworkTimeout(Executor arg0, int arg1) throws SQLException {
// ignored
}
@Override
public void setReadOnly(boolean arg0) throws SQLException {
// ignored
}
@Override
public void setSchema(String arg0) throws SQLException {
// ignored
}
@Override
public void setTransactionIsolation(int arg0) throws SQLException {
// ignored
}
@Override
public void setTypeMap(Map> arg0) throws SQLException {
// ignored
}
// other operations expose the error
@Override
public boolean isWrapperFor(Class arg0) throws SQLException {
throw error();
}
@Override
public T unwrap(Class arg0) throws SQLException {
throw error();
}
@Override
public void abort(Executor arg0) throws SQLException {
throw error();
}
@Override
public void commit() throws SQLException {
throw error();
}
@Override
public Array createArrayOf(String arg0, Object[] arg1) throws SQLException {
throw error();
}
@Override
public Blob createBlob() throws SQLException {
throw error();
}
@Override
public Clob createClob() throws SQLException {
throw error();
}
@Override
public NClob createNClob() throws SQLException {
throw error();
}
@Override
public SQLXML createSQLXML() throws SQLException {
throw error();
}
@Override
public Statement createStatement() throws SQLException {
throw error();
}
@Override
public Statement createStatement(int arg0, int arg1) throws SQLException {
throw error();
}
@Override
public Statement createStatement(int arg0, int arg1, int arg2) throws SQLException {
throw error();
}
@Override
public Struct createStruct(String arg0, Object[] arg1) throws SQLException {
throw error();
}
@Override
public boolean getAutoCommit() throws SQLException {
throw error();
}
@Override
public String getCatalog() throws SQLException {
throw error();
}
@Override
public Properties getClientInfo() throws SQLException {
throw error();
}
@Override
public String getClientInfo(String arg0) throws SQLException {
throw error();
}
@Override
public int getHoldability() throws SQLException {
throw error();
}
@Override
public DatabaseMetaData getMetaData() throws SQLException {
throw error();
}
@Override
public int getNetworkTimeout() throws SQLException {
throw error();
}
@Override
public String getSchema() throws SQLException {
throw error();
}
@Override
public int getTransactionIsolation() throws SQLException {
throw error();
}
@Override
public Map> getTypeMap() throws SQLException {
throw error();
}
@Override
public SQLWarning getWarnings() throws SQLException {
throw error();
}
@Override
public boolean isReadOnly() throws SQLException {
throw error();
}
@Override
public String nativeSQL(String arg0) throws SQLException {
throw error();
}
@Override
public CallableStatement prepareCall(String arg0) throws SQLException {
throw error();
}
@Override
public CallableStatement prepareCall(String arg0, int arg1, int arg2) throws SQLException {
throw error();
}
@Override
public CallableStatement prepareCall(String arg0, int arg1, int arg2, int arg3) throws SQLException {
throw error();
}
@Override
public PreparedStatement prepareStatement(String arg0) throws SQLException {
throw error();
}
@Override
public PreparedStatement prepareStatement(String arg0, int arg1) throws SQLException {
throw error();
}
@Override
public PreparedStatement prepareStatement(String arg0, int[] arg1) throws SQLException {
throw error();
}
@Override
public PreparedStatement prepareStatement(String arg0, String[] arg1) throws SQLException {
throw error();
}
@Override
public PreparedStatement prepareStatement(String arg0, int arg1, int arg2) throws SQLException {
throw error();
}
@Override
public PreparedStatement prepareStatement(String arg0, int arg1, int arg2, int arg3) throws SQLException {
throw error();
}
@Override
public void releaseSavepoint(Savepoint arg0) throws SQLException {
throw error();
}
@Override
public void rollback() throws SQLException {
throw error();
}
@Override
public void rollback(Savepoint arg0) throws SQLException {
throw error();
}
@Override
public Savepoint setSavepoint() throws SQLException {
throw error();
}
@Override
public Savepoint setSavepoint(String arg0) throws SQLException {
throw error();
}
}