Examples with LineReaderAdapter org.voltdb.utils.LineReaderAdapter used on opensource projects

Example 1 with LineReaderAdapter

use of org.voltdb.utils.LineReaderAdapter in project voltdb by VoltDB.

the class DDLCompiler method loadSchemaWithFiltering.

public void loadSchemaWithFiltering(Reader reader, final Database db, final DdlProceduresToLoad whichProcs, SQLParser.FileInfo fileInfo) throws VoltCompiler.VoltCompilerException {
    final LineReaderAdapter lineReader = new LineReaderAdapter(reader);
    DDLParserCallback callback = new DDLParserCallback() {

        @Override
        public void statement(String statement, int lineNum) throws VoltCompiler.VoltCompilerException {
            try {
                if (statement == null || statement.trim().isEmpty()) {
                    return;
                }
                doExecuteStatement(statement.trim() + ";", lineNum);
            } catch (Exception e) {
                throw m_compiler.new VoltCompilerException(e);
            }
        }

        @Override
        public void batch(String batch, int batchEndLineNumber) throws VoltCompiler.VoltCompilerException {
            try {
                String[] parts = batch.split(";");
                int currLine = batchEndLineNumber - parts.length;
                for (String s : parts) {
                    if (!s.trim().isEmpty()) {
                        doExecuteStatement(s.trim() + ";", currLine++);
                    }
                }
            } catch (Exception e) {
                throw m_compiler.new VoltCompilerException(e);
            }
        }

        private void doExecuteStatement(String statement, int lineNum) throws VoltCompiler.VoltCompilerException {
            // Filter out any statements that we don't want to deal with
            if (statement.toUpperCase().startsWith("LOAD")) {
                return;
            }
            DDLStatement stmt = new DDLStatement(statement, lineNum);
            processVoltDBStatements(db, whichProcs, stmt);
        }
    };
    try {
        SQLCommand.executeScriptFromReader(fileInfo, lineReader, callback);
    } catch (Exception e) {
        throw m_compiler.new VoltCompilerException(e);
    } finally {
        // NEEDSWORK (ENG-12255): This really should be done outside the loop, by the caller. The exception propagation, at this point, is pretty messy, and
        // changing it would be a pretty big effort that's really not relevant to this ticket. Fix this sometime.
        lineReader.close();
    }
    // process extra classes
    m_tracker.addExtraClasses(m_classMatcher.getMatchedClassList());
    // possibly save some memory
    m_classMatcher.clear();
}