+
−import org.monetdb.jdbc.MonetConnection;
+
−import org.monetdb.jdbc.MonetDownloadHandler;
+
−import org.monetdb.jdbc.MonetUploadHandler;
+
−
+
−import java.io.*;
+
−import java.nio.charset.StandardCharsets;
+
−import java.sql.SQLException;
+
−
+
−public final class OnClientTester extends TestRunner {
+
−
+
−	public OnClientTester(String jdbcUrl, int verbosity, boolean watchDogEnabled) {
+
−		super(jdbcUrl, verbosity, watchDogEnabled);
+
−	}
+
−
+
−	public static void main(String[] args) throws SQLException, NoSuchMethodException {
+
−		String jdbcUrl = null;
+
−		String requiredPrefix = null;
+
−		int verbosity = 0;
+
−		boolean watchDogEnabled = true;
+
−
+
−		for (String arg : args) {
+
−			if (arg.equals("-v"))
+
−				verbosity++;
+
−			else if (arg.equals("-vv"))
+
−				verbosity += 2;
+
−			else if (arg.equals("-w"))
+
−				watchDogEnabled = false;
+
−			else if (jdbcUrl == null)
+
−				jdbcUrl = arg;
+
−			else if (requiredPrefix == null)
+
−				requiredPrefix = arg;
+
−			else {
+
−				System.err.println("Unexpected argument " + arg);
+
−				System.exit(2);
+
−			}
+
−		}
+
−
+
−		OnClientTester tester = new OnClientTester(jdbcUrl, verbosity, watchDogEnabled);
+
−		int failures = tester.runTests(requiredPrefix);
+
−
+
−		if (failures > 0)
+
−			System.exit(1);
+
−	}
+
−
+
−	protected void prepare() throws SQLException {
+
−		execute("DROP TABLE IF EXISTS foo");
+
−		execute("CREATE TABLE foo (i INT, t TEXT)");
+
−	}
+
−
+
−	public void test_Upload() throws Exception {
+
−		prepare();
+
−		MyUploadHandler handler = new MyUploadHandler(100);
+
−		conn.setUploadHandler(handler);
+
−		update("COPY INTO foo FROM 'banana' ON CLIENT", 100);
+
−		assertEq("handler encountered write error", false, handler.encounteredWriteError());
+
−		queryInt("SELECT COUNT(*) FROM foo", 100);
+
−	}
+
−
+
−	public void test_ClientRefusesUpload() throws Exception {
+
−		prepare();
+
−		MyUploadHandler handler = new MyUploadHandler("immediate error");
+
−		conn.setUploadHandler(handler);
+
−		expectError("COPY INTO foo FROM 'banana' ON CLIENT", "immediate error");
+
−		assertEq("handler encountered write error", false, handler.encounteredWriteError());
+
−		queryInt("SELECT COUNT(*) FROM foo", 0);
+
−	}
+
−
+
−	public void test_Offset0() throws SQLException, Failure {
+
−		prepare();
+
−		MyUploadHandler handler = new MyUploadHandler(100);
+
−		conn.setUploadHandler(handler);
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−		update("COPY OFFSET 0 INTO foo FROM 'banana' ON CLIENT", 100);
+
−		assertEq("handler encountered write error", false, handler.encounteredWriteError());
+
−		queryInt("SELECT MIN(i) FROM foo", 1);
+
−		queryInt("SELECT MAX(i) FROM foo", 100);
+
−	}
+
−
+
−	public void test_Offset1() throws SQLException, Failure {
+
−		prepare();
+
−		MyUploadHandler handler = new MyUploadHandler(100);
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−		conn.setUploadHandler(handler);
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−		update("COPY OFFSET 1 INTO foo FROM 'banana' ON CLIENT", 100);
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−		assertEq("handler encountered write error", false, handler.encounteredWriteError());
+
−		queryInt("SELECT MIN(i) FROM foo", 1);
+
−		queryInt("SELECT MAX(i) FROM foo", 100);
+
−	}
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−
+
−	public void test_Offset5() throws SQLException, Failure {
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−		prepare();
+
−		MyUploadHandler handler = new MyUploadHandler(100);
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−		conn.setUploadHandler(handler);
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−		update("COPY OFFSET 5 INTO foo FROM 'banana' ON CLIENT", 96);
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−		assertEq("handler encountered write error", false, handler.encounteredWriteError());
+
−		queryInt("SELECT MIN(i) FROM foo", 5);
+
−		queryInt("SELECT MAX(i) FROM foo", 100);
+
−	}
+
−
+
−	public void test_ServerStopsReading() throws SQLException, Failure {
+
−		prepare();
+
−		MyUploadHandler handler = new MyUploadHandler(100);
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−		conn.setUploadHandler(handler);
+
−		update("COPY 10 RECORDS INTO foo FROM 'banana' ON CLIENT", 10);
+
−		assertEq("handler encountered write error", true, handler.encounteredWriteError());
+
−		// Server stopped reading after 10 rows. Will we stay in sync?
+
−		queryInt("SELECT COUNT(i) FROM foo", 10);
+
−	}
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−
+
−	public void test_Download(int n) throws SQLException, Failure {
+
−		prepare();
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−		MyDownloadHandler handler = new MyDownloadHandler();
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−		conn.setDownloadHandler(handler);
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−		String q = "INSERT INTO foo SELECT value as i, 'number' || value AS t FROM sys.generate_series(0, " + n + ")";
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−		update(q, n);
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−		update("COPY (SELECT * FROM foo) INTO 'banana' ON CLIENT", -1);
+
−		assertEq("download attempts", 1, handler.countAttempts());
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−		assertEq("lines downloaded", n, handler.lineCount());
+
−	}
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−
+
−	public void test_Download() throws SQLException, Failure {
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−		test_Download(100);
+
−	}
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−
+
−	public void test_ClientRefusesDownload() throws SQLException, Failure {
+
−		prepare();
+
−		MyDownloadHandler handler = new MyDownloadHandler("download refused");
+
−		conn.setDownloadHandler(handler);
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−		update("INSERT INTO foo SELECT value as i, 'number' || value AS t FROM sys.generate_series(0, 100)", 100);
+
−		expectError("COPY (SELECT * FROM foo) INTO 'banana' ON CLIENT", "download refused");
+
−		// Wish it were different but the server closes the connection
+
−		expectError("SELECT 42 -- check if the connection still works", "Connection to server lost!");
+
−	}
+
−
+
−	public void test_LargeUpload() throws SQLException, Failure {
+
−		watchDog.setDuration(25_000);
+
−		prepare();
+
−		int n = 4_000_000;
+
−		MyUploadHandler handler = new MyUploadHandler(n);
+
−		conn.setUploadHandler(handler);
+
−		handler.setChunkSize(1024 * 1024);
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−		update("COPY INTO foo FROM 'banana' ON CLIENT", n);
+
−		assertEq("handler encountered write error", false, handler.encounteredWriteError());
+
−		queryInt("SELECT COUNT(DISTINCT i) FROM foo", n);
+
−	}
+
−
+
−	public void test_LargeDownload() throws SQLException, Failure {
+
−		watchDog.setDuration(25_000);
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−		test_Download(4_000_000);
+
−	}
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−
+
−	public void test_UploadFromStream() throws SQLException, Failure {
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−		prepare();
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−		MonetUploadHandler handler = new MonetUploadHandler() {
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−			final String data = "1|one\n2|two\n3|three\n";
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−
+
−			@Override
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−			public void handleUpload(MonetConnection.Upload handle, String name, boolean textMode, int offset) throws IOException {
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−				ByteArrayInputStream s = new ByteArrayInputStream(data.getBytes(StandardCharsets.UTF_8));
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−				handle.uploadFrom(s);
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−			}
+
−		};
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−		conn.setUploadHandler(handler);
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−		update("COPY INTO foo FROM 'banana' ON CLIENT", 3);
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−		queryInt("SELECT i FROM foo WHERE t = 'three'", 3);
+
−	}
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−
+
−	public void test_UploadFromReader() throws SQLException, Failure {
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−		prepare();
+
−		MonetUploadHandler handler = new MonetUploadHandler() {
+
−			final String data = "1|one\n2|two\n3|three\n";
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−
+
−			@Override
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−			public void handleUpload(MonetConnection.Upload handle, String name, boolean textMode, int offset) throws IOException {
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−				StringReader r = new StringReader(data);
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−				handle.uploadFrom(r);
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−			}
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−		};
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−		conn.setUploadHandler(handler);
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−		update("COPY INTO foo FROM 'banana' ON CLIENT", 3);
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−		queryInt("SELECT i FROM foo WHERE t = 'three'", 3);
+
−	}
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−
+
−	public void test_UploadFromReaderOffset() throws SQLException, Failure {
+
−		prepare();
+
−		MonetUploadHandler handler = new MonetUploadHandler() {
+
−			final String data = "1|one\n2|two\n3|three\n";
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−
+
−			@Override
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−			public void handleUpload(MonetConnection.Upload handle, String name, boolean textMode, int offset) throws IOException {
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−				BufferedReader r = new BufferedReader(new StringReader(data));
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−				handle.uploadFrom(r, offset);
+
−			}
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−		};
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−		conn.setUploadHandler(handler);
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−		update("COPY OFFSET 2 INTO foo FROM 'banana' ON CLIENT", 2);
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−		queryInt("SELECT i FROM foo WHERE t = 'three'", 3);
+
−	}
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−
+
−	public void test_FailUploadLate() throws SQLException, Failure {
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−		prepare();
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−		MyUploadHandler handler = new MyUploadHandler(100, 50, "i don't like line 50");
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−		conn.setUploadHandler(handler);
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−		expectError("COPY INTO foo FROM 'banana' ON CLIENT", "i don't like");
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−		assertEq("handler encountered write error", false, handler.encounteredWriteError());
+
−		assertEq("connection is closed", true, conn.isClosed());
+
−	}
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−
+
−	// Disabled because it hangs, triggering the watchdog timer
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−	public void testx_FailDownloadLate() throws SQLException, Failure {
+
−		prepare();
+
−		MyDownloadHandler handler = new MyDownloadHandler(200, "download refused");
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−		conn.setDownloadHandler(handler);
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−		update("INSERT INTO foo SELECT value as i, 'number' || value AS t FROM sys.generate_series(0, 100)", 100);
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−		expectError("COPY (SELECT * FROM foo) INTO 'banana' ON CLIENT", "download refused");
+
−		queryInt("SELECT 42 -- check if the connection still works", 42);
+
−	}
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−
+
−	static class MyUploadHandler implements MonetUploadHandler {
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−		private final int rows;
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−		private final int errorAt;
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−		private final String errorMessage;
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−		private boolean encounteredWriteError;
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−
+
−		private int chunkSize = 100; // small number to trigger more bugs
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−
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−		MyUploadHandler(int rows, int errorAt, String errorMessage) {
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−			this.rows = rows;
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−			this.errorAt = errorAt;
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−			this.errorMessage = errorMessage;
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−		}
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−
+
−		MyUploadHandler(int rows) {
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−			this(rows, -1, null);
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−		}
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−
+
−		MyUploadHandler(String errorMessage) {
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−			this(0, -1, errorMessage);
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−		}
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−
+
−		public void setChunkSize(int chunkSize) {
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−			this.chunkSize = chunkSize;
+
−		}
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−
+
−		@Override
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−		public void handleUpload(MonetConnection.Upload handle, String name, boolean textMode, int offset) throws IOException {
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−			int toSkip = offset > 0 ? offset - 1 : 0;
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−			if (errorAt == -1 && errorMessage != null) {
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−				handle.sendError(errorMessage);
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−				return;
+
−			}
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−			handle.setChunkSize(chunkSize);
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−			PrintStream stream = handle.getStream();
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−			for (int i = toSkip; i < rows; i++) {
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−				if (i == errorAt) {
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−					throw new IOException(errorMessage);
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−				}
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−				stream.printf("%d|%d%n", i + 1, i + 1);
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−				if (i % 25 == 0 && stream.checkError()) {
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−					encounteredWriteError = true;
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−					break;
+
−				}
+
−			}
+
−		}
+
−
+
−		public Object encounteredWriteError() {
+
−			return encounteredWriteError;
+
−		}
+
−	}
+
−
+
−	static class MyDownloadHandler implements MonetDownloadHandler {
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−		private final int errorAtByte;
+
−		private final String errorMessage;
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−		private int attempts = 0;
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−		private int bytesSeen = 0;
+
−		private int lineEndingsSeen = 0;
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−		private int startOfLine = 0;
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−
+
−		MyDownloadHandler(int errorAtByte, String errorMessage) {
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−			this.errorAtByte = errorAtByte;
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−			this.errorMessage = errorMessage;
+
−		}
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−
+
−		MyDownloadHandler(String errorMessage) {
+
−			this(-1, errorMessage);
+
−		}
+
−
+
−		MyDownloadHandler() {
+
−			this(-1, null);
+
−		}
+
−
+
−		@Override
+
−		public void handleDownload(MonetConnection.Download handle, String name, boolean textMode) throws IOException {
+
−			attempts++;
+
−			bytesSeen = 0;
+
−			lineEndingsSeen = 0;
+
−			startOfLine = 0;
+
−
+
−			if (errorMessage != null && errorAtByte < 0) {
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−				handle.sendError(errorMessage);
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−				return;
+
−			}
+
−
+
−			InputStream stream = handle.getStream();
+
−			byte[] buffer = new byte[1024];
+
−			while (true) {
+
−				int toRead = buffer.length;
+
−				if (errorMessage != null && errorAtByte >= 0) {
+
−					if (bytesSeen == errorAtByte) {
+
−						throw new IOException(errorMessage);
+
−					}
+
−					toRead = Integer.min(toRead, errorAtByte - bytesSeen);
+
−				}
+
−				int nread = stream.read(buffer, 0, toRead);
+
−				if (nread < 0)
+
−					break;
+
−				for (int i = 0; i < nread; i++) {
+
−					if (buffer[i] == '\n') {
+
−						lineEndingsSeen += 1;
+
−						startOfLine = bytesSeen + i + 1;
+
−					}
+
−				}
+
−				bytesSeen += nread;
+
−			}
+
−		}
+
−
+
−		public int countAttempts() {
+
−			return attempts;
+
−		}
+
−
+
−		public int countBytes() {
+
−			return bytesSeen;
+
−		}
+
−
+
−		public int lineCount() {
+
−			int lines = lineEndingsSeen;
+
−			if (startOfLine != bytesSeen)
+
−				lines++;
+
−			return lines;
+
−		}
+
−	}
+
−
+
−}