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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Other licenses:
* -----------------------------------------------------------------------------
* Commercial licenses for this work are available. These replace the above
* Apache-2.0 license and offer limited warranties, support, maintenance, and
* commercial database integrations.
*
* For more information, please visit: http://www.jooq.org/licenses
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package org.jooq.impl;
// ...
import static org.jooq.conf.ParamType.FORCE_INDEXED;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.jooq.Configuration;
import org.jooq.Parser;
import org.jooq.Queries;
import org.jooq.QueryPart;
import org.jooq.RenderContext;
import org.jooq.impl.QOM.Eq;
import org.jooq.tools.jdbc.DefaultConnection;
/**
* @author Lukas Eder
*/
final class DiagnosticsConnection extends DefaultConnection {
// TODO: Make these configurable
static final int LRU_SIZE_GLOBAL = 50000;
static final int LRU_SIZE_LOCAL = 500;
static final int DUP_SIZE = 500;
static final Map> DUPLICATE_SQL = Collections.synchronizedMap(new LRU<>(LRU_SIZE_GLOBAL));
final Map> repeatedSQL = new LRU<>(LRU_SIZE_LOCAL);
final Configuration configuration;
final RenderContext normalisingRenderer;
final Parser parser;
final DiagnosticsListeners listeners;
DiagnosticsConnection(Configuration configuration) {
super(configuration.connectionProvider().acquire());
this.configuration = configuration;
this.normalisingRenderer = configuration.deriveSettings(s -> s
// Forcing all inline parameters to be indexed helps find opportunities to use bind variables
.withParamType(FORCE_INDEXED)
// Padding IN lists shows duplicates that arise from arbitrary-length dynamic IN lists
.withInListPadding(true)
.withInListPadBase(16)
).dsl().renderContext();
this.parser = configuration.dsl().parser();
this.listeners = DiagnosticsListeners.get(configuration);
}
@Override
public final Statement createStatement() throws SQLException {
return new DiagnosticsStatement(this, getDelegate().createStatement());
}
@Override
public final Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().createStatement(resultSetType, resultSetConcurrency));
}
@Override
public final Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().createStatement(resultSetType, resultSetConcurrency, resultSetHoldability));
}
@Override
public final PreparedStatement prepareStatement(String sql) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().prepareStatement(parse(sql)));
}
@Override
public final PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().prepareStatement(parse(sql), resultSetType, resultSetConcurrency));
}
@Override
public final PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().prepareStatement(parse(sql), resultSetType, resultSetConcurrency, resultSetHoldability));
}
@Override
public final PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().prepareStatement(parse(sql), autoGeneratedKeys));
}
@Override
public final PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().prepareStatement(parse(sql), columnIndexes));
}
@Override
public final PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().prepareStatement(parse(sql), columnNames));
}
@Override
public final CallableStatement prepareCall(String sql) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().prepareCall(parse(sql)));
}
@Override
public final CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().prepareCall(parse(sql), resultSetType, resultSetConcurrency));
}
@Override
public final CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return new DiagnosticsStatement(this, getDelegate().prepareCall(parse(sql), resultSetType, resultSetConcurrency, resultSetHoldability));
}
@Override
public final void close() throws SQLException {
repeatedSQL.clear();
configuration.connectionProvider().release(getDelegate());
}
final String parse(String sql) {
Queries queries = null;
String normalised;
try {
queries = parser.parse(sql);
normalised = normalisingRenderer.render(queries);
}
catch (ParserException exception) {
normalised = sql;
listeners.exception(new DefaultDiagnosticsContext(
"Query could not be parsed.", sql, exception
));
}
try {
Set duplicates = null;
synchronized (DUPLICATE_SQL) {
duplicates = duplicates(DUPLICATE_SQL, sql, normalised);
}
if (duplicates != null)
listeners.duplicateStatements(new DefaultDiagnosticsContext(
"Duplicate statements encountered.",
sql, normalised, duplicates, null, queries, null
));
List repetitions = repetitions(repeatedSQL, sql, normalised);
if (repetitions != null)
listeners.repeatedStatements(new DefaultDiagnosticsContext(
"Repeated statements encountered.",
sql, normalised, null, repetitions, queries, null
));
}
catch (Error e) {
throw e;
}
catch (Throwable exception) {
listeners.exception(new DefaultDiagnosticsContext(
"An unexpected exception has occurred. See exception for details.",
sql, normalised, null, null, queries, exception
));
}
return sql;
}
private Set duplicates(Map> map, String sql, String normalised) {
Set v = map.computeIfAbsent(normalised, k -> new HashSet<>());
if (v.size() >= DUP_SIZE || (v.add(sql) && v.size() > 1))
return v;
else
return null;
}
private List repetitions(Map> map, String sql, String normalised) {
List v = map.computeIfAbsent(normalised, k -> new ArrayList<>());
if (v.size() >= DUP_SIZE || (v.add(sql) && v.size() > 1))
return v;
else
return null;
}
// See https://stackoverflow.com/a/1953516/521799
static class LRU extends LinkedHashMap {
private final int size;
LRU(int size) {
super(size + 1, 1.0f, true);
this.size = size;
}
@Override
protected boolean removeEldestEntry(Entry eldest) {
return size() > size;
}
}
}
