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Prevent autosave timer events from bunching up when the computer is put into sleep mode.

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Don't autosave while creating or importing projects, exporting rows, or uploading data to Freebase. Those are potentially intensive operations.

git-svn-id: http://google-refine.googlecode.com/svn/trunk@627 7d457c2a-affb-35e4-300a-418c747d4874
This commit is contained in:
David Huynh 2010-05-09 04:34:36 +00:00
parent 164abc2057
commit 8c03c1ddcf
6 changed files with 49 additions and 12 deletions
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24
src/main/java/com/metaweb/gridworks/GridworksServlet.java
View File

@ -156,6 +156,19 @@ public class GridworksServlet extends HttpServlet {
_commands.put("mqlwrite", new MQLWriteCommand());
}
final static protected long s_autoSavePeriod = 1000 * 60 * 1; // minutes
static protected class AutoSaveTimerTask extends TimerTask {
public void run() {
try {
ProjectManager.singleton.save(false); // quick, potentially incomplete save
} finally {
_timer.schedule(new AutoSaveTimerTask(), s_autoSavePeriod);
// we don't use scheduleAtFixedRate because that might result in
// bunched up events when the computer is put in sleep mode
}
}
}
@Override
public void init() throws ServletException {
super.init();
@ -164,17 +177,10 @@ public class GridworksServlet extends HttpServlet {
ProjectManager.initialize();
if (_timer == null) {
_timer = new Timer();
_timer = new Timer("autosave");
_timer.schedule(new AutoSaveTimerTask(), s_autoSavePeriod);
}
long period = 1000 * 60 * 5; // 5 minutes
_timer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
ProjectManager.singleton.save(false); // quick, potentially incomplete save
}
}, period, period);
logger.trace("< initialize");
}

17
src/main/java/com/metaweb/gridworks/ProjectManager.java
View File

@ -51,6 +51,11 @@ public class ProjectManager {
*/
transient protected InterProjectModel _interProjectModel = new InterProjectModel();
/**
* Flags
*/
transient protected int _busy = 0; // heavy operations like creating or importing projects are going on
static public ProjectManager singleton;
static public synchronized void initialize() {
@ -260,6 +265,16 @@ public class ProjectManager {
}
}
public void setBusy(boolean busy) {
synchronized (this) {
if (busy) {
_busy++;
} else {
_busy--;
}
}
}
public void addLatestExpression(String s) {
synchronized (this) {
_expressions.remove(s);
@ -275,9 +290,11 @@ public class ProjectManager {
}
public void save(boolean allModified) {
if (allModified || _busy == 0) {
saveProjects(allModified);
saveWorkspace();
}
}
/**
* Save the workspace's data out to file in a safe way: save to a temporary file first

3
src/main/java/com/metaweb/gridworks/commands/edit/CreateProjectCommand.java
View File

@ -62,6 +62,7 @@ public class CreateProjectCommand extends Command {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
ProjectManager.singleton.setBusy(true);
try {
/*
* The uploaded file is in the POST body as a "file part". If
@ -97,6 +98,8 @@ public class CreateProjectCommand extends Command {
ParsingUtilities.encode("Failed to import file: " + e.getLocalizedMessage())
);
e.printStackTrace();
} finally {
ProjectManager.singleton.setBusy(false);
}
}

3
src/main/java/com/metaweb/gridworks/commands/edit/ImportProjectCommand.java
View File

@ -36,6 +36,7 @@ public class ImportProjectCommand extends Command {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
ProjectManager.singleton.setBusy(true);
try {
Properties options = ParsingUtilities.parseUrlParameters(request);
@ -63,6 +64,8 @@ public class ImportProjectCommand extends Command {
}
} catch (Exception e) {
e.printStackTrace();
} finally {
ProjectManager.singleton.setBusy(false);
}
}

4
src/main/java/com/metaweb/gridworks/commands/edit/UploadDataCommand.java
View File

@ -11,6 +11,7 @@ import javax.servlet.http.HttpServletResponse;
import org.json.JSONException;
import org.json.JSONObject;
import com.metaweb.gridworks.ProjectManager;
import com.metaweb.gridworks.browsing.Engine;
import com.metaweb.gridworks.commands.Command;
import com.metaweb.gridworks.exporters.TripleloaderExporter;
@ -23,6 +24,7 @@ public class UploadDataCommand extends Command {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
ProjectManager.singleton.setBusy(true);
try {
Project project = getProject(request);
Engine engine = getEngine(request, project);
@ -48,6 +50,8 @@ public class UploadDataCommand extends Command {
} catch (Exception e) {
respondException(response, e);
} finally {
ProjectManager.singleton.setBusy(false);
}
}
}

4
src/main/java/com/metaweb/gridworks/commands/info/ExportRowsCommand.java
View File

@ -10,6 +10,7 @@ import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.metaweb.gridworks.ProjectManager;
import com.metaweb.gridworks.browsing.Engine;
import com.metaweb.gridworks.commands.Command;
import com.metaweb.gridworks.exporters.Exporter;
@ -32,6 +33,7 @@ public class ExportRowsCommand extends Command {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
ProjectManager.singleton.setBusy(true);
try {
Project project = getProject(request);
Engine engine = getEngine(request, project);
@ -53,6 +55,8 @@ public class ExportRowsCommand extends Command {
}
} catch (Exception e) {
respondException(response, e);
} finally {
ProjectManager.singleton.setBusy(false);
}
}
}