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org.babyfish.jimmer.sql.runtime.DefaultExecutor Maven / Gradle / Ivy
package org.babyfish.jimmer.sql.runtime;
import org.babyfish.jimmer.impl.util.Classes;
import org.babyfish.jimmer.meta.ImmutableProp;
import org.babyfish.jimmer.sql.collection.TypedList;
import org.babyfish.jimmer.sql.exception.ExecutionException;
import org.babyfish.jimmer.sql.meta.IdGenerator;
import org.babyfish.jimmer.sql.meta.impl.SequenceIdGenerator;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import java.util.function.BiFunction;
import static org.babyfish.jimmer.sql.ScalarProviderUtils.getSqlType;
import static org.babyfish.jimmer.sql.ScalarProviderUtils.toSql;
public class DefaultExecutor implements Executor {
public static final DefaultExecutor INSTANCE = new DefaultExecutor();
DefaultExecutor() {
}
private static void setParameters(
PreparedStatement stmt,
List variables,
JSqlClientImplementor sqlClient
) throws Exception {
ParameterIndex parameterIndex = new ParameterIndex();
for (Object variable : variables) {
if (variable instanceof DbLiteral) {
DbLiteral literal = (DbLiteral) variable;
literal.setParameter(
stmt,
parameterIndex,
sqlClient
);
} else if (variable instanceof TypedList) {
TypedList typedList = (TypedList) variable;
stmt.setArray(
parameterIndex.get(),
stmt.getConnection().createArrayOf(typedList.getSqlElementType(), typedList.toArray())
);
} else {
stmt.setObject(parameterIndex.get(), variable);
}
}
}
@Override
public R execute(@NotNull Args args) {
String sql = args.sql;
List variables = args.variables;
JSqlClientImplementor sqlClient = args.sqlClient;
try (PreparedStatement stmt = args.statementFactory != null ?
args.statementFactory.preparedStatement(args.con, sql) :
args.con.prepareStatement(sql)
) {
setParameters(stmt, variables, sqlClient);
return args.block.apply(stmt);
} catch (Exception ex) {
ExceptionTranslator exceptionTranslator =
args.sqlClient.getExceptionTranslator();
if (exceptionTranslator != null) {
ex = exceptionTranslator.translate(ex, args);
}
if (ex instanceof RuntimeException) {
throw (RuntimeException) ex;
}
throw new ExecutionException(
"Cannot execute SQL statement: " +
sql +
", variables: " +
variables,
ex
);
}
}
@Override
public BatchContext executeBatch(
@NotNull Connection con,
@NotNull String sql,
@Nullable ImmutableProp generatedIdProp,
@NotNull ExecutionPurpose purpose,
@NotNull JSqlClientImplementor sqlClient
) {
return new BatchContextImpl(
con,
sql,
generatedIdProp,
purpose,
ExecutorContext.create(sqlClient),
sqlClient
);
}
private static class BatchContextImpl implements BatchContext {
private static final Object[] EMPTY_GENERATED_IDS = new Object[0];
private final Savepoint savepoint;
private final String sql;
private final PreparedStatement statement;
@Nullable
private final ImmutableProp generatedIdProp;
private final ExecutionPurpose purpose;
private final ExecutorContext executorContext;
private final JSqlClientImplementor sqlClient;
private int batchCount;
private List executedListeners;
BatchContextImpl(
Connection con,
String sql,
@Nullable ImmutableProp generatedIdProp,
ExecutionPurpose purpose,
ExecutorContext executorContext,
JSqlClientImplementor sqlClient
) {
if (sqlClient.getDialect().isTransactionAbortedByError()) {
try {
savepoint = con.getAutoCommit() ? null : con.setSavepoint();
} catch (SQLException ex) {
throwException(ex);
throw new AssertionError("Internal bug: impossible logic");
}
} else {
savepoint = null;
}
PreparedStatement statement;
try {
if (generatedIdProp != null) {
IdGenerator idGenerator = sqlClient.getIdGenerator(generatedIdProp.getDeclaringType().getJavaClass());
if (idGenerator instanceof SequenceIdGenerator) {
statement = con.prepareStatement(sql, new int[]{1});
} else {
statement = con.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS);
}
} else {
statement = con.prepareStatement(sql);
}
} catch (SQLException ex) {
throw new ExecutionException(
"Cannot create the batch SQL statement: " + sql,
ex
);
}
this.purpose = purpose;
this.executorContext = executorContext;
this.sql = sql;
this.statement = statement;
this.generatedIdProp = generatedIdProp;
this.sqlClient = sqlClient;
}
@Override
public JSqlClientImplementor sqlClient() {
return sqlClient;
}
@Override
public String sql() {
return sql;
}
@Override
public ExecutionPurpose purpose() {
return purpose;
}
@Override
public ExecutorContext ctx() {
return executorContext;
}
@Override
public void add(List variables) {
try {
setParameters(statement, variables, sqlClient);
statement.addBatch();
batchCount++;
} catch (Exception ex) {
throw new ExecutionException(
"Cannot add batch into the batch SQL statement: " +
sql +
", variables: " +
variables,
ex
);
}
}
@Override
public int[] execute(BiFunction exceptionTranslator) {
try {
return statement.executeBatch();
} catch (SQLException ex) {
if (savepoint != null) {
try {
statement.getConnection().rollback(savepoint);
} catch (SQLException innerEx) {
throwException(innerEx);
}
}
if (exceptionTranslator != null) {
Exception translatedException = exceptionTranslator.apply(ex, this);
if (translatedException != null) {
throwException(translatedException);
}
} else {
ExceptionTranslator defaultExceptionTranslator =
sqlClient.getExceptionTranslator();
if (defaultExceptionTranslator != null) {
Exception translatedException = defaultExceptionTranslator.translate(ex, this);
if (translatedException != null) {
throwException(translatedException);
}
}
}
throwException(ex);
throw new AssertionError("Internal bug");
}
}
private void throwException(Exception ex) {
if (ex instanceof RuntimeException) {
throw (RuntimeException) ex;
}
throw new ExecutionException(
"Cannot execute the batch SQL statement: " + sql,
ex
);
}
@Override
public Object[] generatedIds() {
if (generatedIdProp == null) {
return EMPTY_GENERATED_IDS;
}
Object[] ids = new Object[batchCount];
int index = 0;
ScalarProvider provider = sqlClient.getScalarProvider(generatedIdProp);
Class sqlType = provider != null ?
getSqlType(provider, sqlClient.getDialect()) :
Classes.boxTypeOf(generatedIdProp.getReturnClass());
try (ResultSet rs = statement.getGeneratedKeys()) {
while (rs.next()) {
Object id = rs.getObject(1, sqlType);
if (id != null && provider != null) {
id = toSql(id, provider, sqlClient.getDialect());
}
ids[index++] = id;
}
} catch (Exception ex) {
throw new ExecutionException(
"Cannot get generated ids for batch SQL statement: " + sql,
ex
);
}
return ids;
}
@Override
public void addExecutedListener(Runnable listener) {
if (listener == null) {
return;
}
List listeners = executedListeners;
if (listeners == null) {
executedListeners = listeners = new ArrayList<>();
}
listeners.add(listener);
}
@Override
public void close() {
try {
try {
if (savepoint != null) {
statement.getConnection().releaseSavepoint(savepoint);
}
} finally {
statement.close();
}
} catch (SQLException ex) {
throw new ExecutionException(
"Cannot execute the batch SQL statement: " + sql,
ex
);
} finally {
List listeners = executedListeners;
if (listeners != null) {
for (Runnable runnable : listeners) {
runnable.run();
}
}
}
}
}
}
