Yup, CT4E connects up the Eclipse Platform/Debug and JDT/Debug support, which works across JDWP (a component of JPDA), to debug the dev_appserver. But fortunately nobody needs to ever know about it!
Brian. > On 9-May-2017, at 2:49 PM, 'Adam (Cloud Platform Support)' via Google App > Engine <[email protected]> wrote: > > Yes, I should have specified that I meant the project type, not the plugin, > since CT4E of course allows you to create a Maven-based project as well. I'm > mostly speaking from personal preference. I like the additional options you > get with M2Eclipse (like being able to specify a working set), and do most > command invocation from a terminal. Hot reload also works fine when debugging > this way with 'Build automatically' enabled in Eclipse, as it will replace > .class files directly in the target/ directory without needing to invoke a > Maven build. > > Thanks Brian for shedding light on how CT4E handles debugging and integration > with WTP. My understanding was that the JPDA remote debugger is still used > under the hood when debugging locally in WTP, but I am nowhere near an expert > on the Eclipse platform. Is this the case? > > On Tuesday, May 9, 2017 at 11:11:00 AM UTC-4, Brian de Alwis wrote: > CT4E offers two styles of App Engine projects for the standard environment: > > > > The first one, the Google App Engine Standard Java Project, is a "native" > WTP-based Eclipse project style. The Maven-based Google App Engine Standard > Java Project creates a Maven-based project using the new Maven App Engine > plugins. This Maven project uses M2Eclipse and its accompanying m2e-wtp > bindings to integrate with Eclipse, which works very well. > > So I believe Adam is recommending using Maven-based projects for important > projects, like what is created by the second wizard. I agree with that > recommendation as it allows leveraging the many tools in the Maven ecosystem > and works well with existing CI/CD solutions. > > Brian. > >> On 9-May-2017, at 4:59 AM, Joshua Fox wrote: >> >> >> >> >> Eclipse incremental compiler and WTP to enable immediate run/debug and >> class replacement at debug-time >> >> Thank you. That makes sense. >> >> Adam of Cloud Platform Support, your statement (copied immediately below in >> blue ) seems to contradict Brian's. Could you please explain? >>> >>> On Sat, May 6, 2017 at 11:08 PM, 'Adam (Cloud Platform Support)' via Google >>> App Engine <[email protected] >>> <mailto:[email protected]>> wrote: >>> ... >>> a. Cloud Tools for Eclipse seems to be more of a 'getting started quickly' >>> solution, with some UI conveniences but fewer features, so for more serious >>> projects I'd personally recommend the Maven plugin. >>> >>> b. This really depends on your needs. There's nothing you can do with the >>> Cloud Tools plugin that you can't do with the Maven plugin, and as >>> mentioned you can also use both (one is a plugin for Maven via pom.xml, the >>> other is for the Eclipse project proper, and they don't mess with each >>> other). >> >> >> >> On Mon, May 8, 2017 at 5:30 PM, Brian de Alwis wrote: >> CT4E is to the Maven plugin as m2eclipse is for maven: it uses Eclipse for >> what Eclipse does best, and Maven for what Maven does best. CT4E leverages >> the Eclipse incremental compiler and WTP to enable immediate run/debug and >> class replacement at debug-time without having to restart the world. And it >> also supports deployment from within Eclipse. >> >> Brian. >> >>> On 8-May-2017, at 9:23 AM, Joshua Fox wrote: >>> >>> >>> On Mon, May 8, 2017 at 4:07 PM, Brian de Alwis wrote: >>> Josuha, you can use the Cloud Tools for Eclipse (CT4E, the successor to >>> GPE) for launching even with Maven based plugins. >>> >>> Thank you. What added value does CT4E provide as compared to just Maven? >>> Note that Adam of Google Support said: >>> >>> >>> a. Cloud Tools for Eclipse seems to be more of a 'getting started quickly' >>> solution, with some UI conveniences but fewer features, so for more serious >>> projects I'd personally recommend the Maven plugin. >>> b. This really depends on your needs. There's nothing you can do with the >>> Cloud Tools plugin that you can't do with the Maven plugin, >>> >>> >>> >>> >>> I didn't see a reference to this in the email thread, but I'm guessing >>> you're launching multiple services? Launching multiple services is >>> supported by CT4E. >>> >>> >>> No, we are just launching the builtin dev-appserver that you get when you >>> run Maven goal appengine:run on the Cloud-SDK Based >>> <https://cloud.google.com/appengine/docs/standard/java/tools/using-maven> >>> Maven plugin. Of course, I don't insist on using Maven to launch. Whatever >>> it takes to avoid launching two processes just to debug ( appengine:run >>> plus the "remote" debugger). >>> >>> >>> With regard to Flex, CT4E is concentrating on the deployment side of the >>> story. >>> >>> Right. Deployment in an Eclipse tool is less valuable to us, as we have >>> Jenkins setup to deploy. In fact, Google Support, in early 2017, told us >>> that CT4E does not support Flex Env. I think they were referring to >>> limitations in deployment and a local Dockerized Flex -- but we do not need >>> those. >>> >>> For run/debug, the solutions right now are to use the Maven goals or other >>> plugins like Run Jetty Run: >>> >>> https://marketplace.eclipse.org/content/run-jetty-run >>> <https://marketplace.eclipse.org/content/run-jetty-run> >>> >>> Debugging of a Flex-like (not supporting GAE APIs) local environment inside >>> Eclipse is possible with the Jetty Maven plugin. >>> <https://cloud.google.com/appengine/docs/flexible/java/dev-jetty9> >>> >>> But I guess you are saying that Run Jetty Run >>> <https://marketplace.eclipse.org/content/run-jetty-run> would make this >>> more efficient? I.e., we'd have one debug process rather than '"remote" >>> debugging; and we'd avoid build time in which Maven constructs wars? If >>> that can be done for a Standard-Env-like local dev environment (of the >>> sort supported by the Cloud-SDK Based >>> <https://cloud.google.com/appengine/docs/standard/java/tools/using-maven> >>> Maven plugin or the old Google Plugin for Eclipse), that would be excellent! >>> >>> Brian. >>> >>>> On 8-May-2017, at 6:43 AM, Joshua Fox wrote: >>>> >>>> We have been using the Google Plugin for Eclipse (now end-of-life). >>>> There, we are able to launch an Eclipse Debug configuration that puts us >>>> right into the debugger. (Screenshot attached.) >>>> >>>> Launching two separate processes (first appengine:runfrom the >>>> Cloud-SDK-Based >>>> <https://cloud.google.com/appengine/docs/standard/java/tools/using-maven> >>>> Maven plugin, then the remote debug process) is particularly inconvenient >>>> given that dozens of developer must do this many times a day. >>>> >>>> We'd like to have the same simplicity of a single launch. >>>> >>>> <image.png> >>>> >>>> On Sun, May 7, 2017 at 9:38 PM, 'Adam (Cloud Platform Support)' via Google >>>> App Engine <[email protected] >>>> <mailto:[email protected]>> wrote: >>>> I'm not sure I follow. You need to launch the dev_appserver process anyway >>>> to run your application locally. You're just passing extra JVM flags to >>>> enable the remote debugger so JDB can talk to it. AFAIK you need to enable >>>> the JPDA remote debugger to debug any Jetty app (or servlet container app >>>> for that matter). It's not a limitation of App Engine or the plugins. >>>> >>>> On Sunday, May 7, 2017 at 9:01:22 AM UTC-4, Joshua Fox wrote: >>>> >>>> >>>> On Sat, May 6, 2017 at 11:08 PM, 'Adam (Cloud Platform Support)' via >>>> Google App Engine <[email protected] >>>> <mailto:[email protected]>> wrote: >>>> 1. If I want to debug my projects without using "remote debugging"? >>>> You need to use remote debugging to debug App Engine applications in >>>> Eclipse as the debugger must connect to the Jetty instance running on >>>> localhost. >>>> >>>> This is inconvenient. Every time a developer runs their code, they have >>>> to launch two processes. Is there a plan to improve that? >>>> >>>> >>>> >>>> a. You don't need to use Google Cloud Tools for Eclipse as both maven >>>> plugins support the jvmFlags option which allows you to provide the >>>> necessary JVM flags for debugging >>>> <http://www.eclipse.org/jetty/documentation/9.4.5.v20170502/enable-remote-debugging.html>: >>>> >>>> <configuration> >>>> <jvmFlags> >>>> <jvmFlag>-Xdebug</jvmFlag> >>>> >>>> <jvmFlag>-Xrunjdwp:transport=dt_socket,address=9999,server=y,suspend=n</jvmFlag> >>>> </jvmFlags> >>>> </configuration> >>>> >>>> See the related discussion in an issue >>>> <https://github.com/GoogleCloudPlatform/appengine-maven-plugin/issues/6#issuecomment-134697957> >>>> on the old plugin's project page for a solution involving Maven profiles >>>> (this applies equally to the new plugin as the same parameter is >>>> supported). >>>> >>>> b. The ability to connect the debugger isn't dependent on the version of >>>> dev_appserver, which is mostly a Python wrapper around Jetty, so yes you >>>> would still be able to debug with either plugin. Note that as Jeff >>>> mentioned you can also use both plugins in your project. >>>> >>>> 2. What is the recommended development setup for Standard Env? >>>> a. Cloud Tools for Eclipse seems to be more of a 'getting started quickly' >>>> solution, with some UI conveniences but fewer features, so for more >>>> serious projects I'd personally recommend the Maven plugin. >>>> >>>> b. This really depends on your needs. There's nothing you can do with the >>>> Cloud Tools plugin that you can't do with the Maven plugin, and as >>>> mentioned you can also use both (one is a plugin for Maven via pom.xml, >>>> the other is for the Eclipse project proper, and they don't mess with each >>>> other). >>>> >>>> 3. What is the recommended development setup for Flex Env development? >>>> No special App-Enginey bits are needed to test a flexible runtime app >>>> locally or manage it in Eclipse. This is covered in the docs >>>> <https://cloud.google.com/appengine/docs/flexible/java/testing-and-deploying-your-app#running_locally>; >>>> you can use mvn jetty:run-exploded with the Jetty plugin if you're on a >>>> Jetty based runtime or just mvn package; java -jar target/myjar.jar on any >>>> other runtime. A flexible runtime Java app is essentially just a >>>> Dockerized Java app that happens to run on the Flexible runtime. >>>> >>>> On Wednesday, May 3, 2017 at 8:03:33 AM UTC-4, Joshua Fox wrote: >>>> A question about Google Cloud Tools for Eclipse >>>> <https://cloud.google.com/eclipse/docs/>, given all these changes. >>>> >>>> >>>> 1. If I want to debug my projects without using "remote debugging"? >>>> a. Do I need Google Cloud Tools for Eclipse? >>>> b. We are using the Cloud-SDK-Based >>>> <https://cloud.google.com/appengine/docs/standard/java/tools/using-maven> >>>> 1.30 Maven plugin which has dev-appserver v1. If we wait until >>>> Cloud-SDK-Based Maven plugin goes back to dev-appserver v2, (how long >>>> might hat be), will we be able to debug with a Cloud-SDK-Based Maven >>>> project (opened in Eclipse, but without Google Cloud Tools for Eclipse)? >>>> >>>> 2. What is the recommended development setup for Standard Env? >>>> a. Is it Cloud Tools for Eclipse with the Cloud-SDK-Based Maven plugin? >>>> b. Or just Cloud-SDK-Based Maven plugin without Cloud Tools for Eclipse? >>>> >>>> 3. What is the recommended development setup for Flex Env development? We >>>> need a single dev-environment to develop a GAE-Standard-Env service and a >>>> GAE-Flex-Env service on the same codebase. >>>> - We actually don't need "Flex support" in the sense of a local Docker or >>>> builtin deployment. So the fact that Cloud Tools for Eclipse is said to >>>> not support Flex might not be relevant. >>>> - For launching an appserver, we can use the Maven-Jetty plugin >>>> (org.eclipse.jetty::jetty-maven-plugin v 9.4.2) >>>> - But I am not sure if that is the full recommended setup. What do you >>>> suggest? >>>> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "Google App Engine" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to [email protected] >>>> <mailto:[email protected]>. >>>> To post to this group, send email to [email protected] >>>> <mailto:[email protected]>. >>>> Visit this group at https://groups.google.com/group/google-appengine >>>> <https://groups.google.com/group/google-appengine>. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/google-appengine/e0ad51ba-3dc0-45cd-8743-2fb1f9ba55a7%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/google-appengine/e0ad51ba-3dc0-45cd-8743-2fb1f9ba55a7%40googlegroups.com?utm_medium=email&utm_source=footer>. >>>> >>>> For more options, visit https://groups.google.com/d/optout >>>> <https://groups.google.com/d/optout>. >>>> >>>> >>>> >>>> -- >>>> JOSHUA FOX >>>> Principal Software Architect | Freightos >>>> >>>> >>>> >>>> ☏ (Israel): +972-545691165 <> | ☏ (US): <> +1-3123400953 <> | Skype: >>>> joshuafox.freightos >>>> Smoother shipping with the world's online freight marketplace. >>>> Online Marketplace >>>> <https://www.google.com/url?q=https%3A%2F%2Fwww.freightos.com%2Fcompare-book-manage-freight-quotes%2F&sa=D&sntz=1&usg=AFrqEzfMkBQBWsovNlg47sIDORa5FpHDkQ> >>>> / In the News >>>> <https://www.google.com/url?q=https%3A%2F%2Fwww.freightos.com%2Fabout-us%2Fin-the-news%2F&sa=D&sntz=1&usg=AFrqEzexnYSKKYuEW4zuC-QrR4X8G53w6Q> >>>> / Freightos Blog >>>> <http://www.google.com/url?q=http%3A%2F%2Ffreightos.com%2Fresources%2Ffreightos-blog%2F&sa=D&sntz=1&usg=AFrqEzczY9ZxESxvh7ITnd_Al01Xyp4gdA> >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "Google App Engine" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to [email protected] >>>> <mailto:[email protected]>. >>>> To post to this group, send email to [email protected] >>>> <mailto:[email protected]>. >>>> Visit this group at https://groups.google.com/group/google-appengine >>>> <https://groups.google.com/group/google-appengine>. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/google-appengine/428996ed-dac8-46b5-bfb0-7457adc8702c%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/google-appengine/428996ed-dac8-46b5-bfb0-7457adc8702c%40googlegroups.com?utm_medium=email&utm_source=footer>. >>>> >>>> For more options, visit https://groups.google.com/d/optout >>>> <https://groups.google.com/d/optout>. >>>> >>>> >>>> >>>> -- >>>> JOSHUA FOX >>>> Principal Software Architect | Freightos >>>> >>>> >>>> >>>> ☏ (Israel): +972-545691165 <> | ☏ (US): <> +1-3123400953 <> | Skype: >>>> joshuafox.freightos >>>> Smoother shipping with the world's online freight marketplace. >>>> Online Marketplace >>>> <https://www.google.com/url?q=https%3A%2F%2Fwww.freightos.com%2Fcompare-book-manage-freight-quotes%2F&sa=D&sntz=1&usg=AFrqEzfMkBQBWsovNlg47sIDORa5FpHDkQ> >>>> / In the News >>>> <https://www.google.com/url?q=https%3A%2F%2Fwww.freightos.com%2Fabout-us%2Fin-the-news%2F&sa=D&sntz=1&usg=AFrqEzexnYSKKYuEW4zuC-QrR4X8G53w6Q> >>>> / Freightos Blog >>>> <http://www.google.com/url?q=http%3A%2F%2Ffreightos.com%2Fresources%2Ffreightos-blog%2F&sa=D&sntz=1&usg=AFrqEzczY9ZxESxvh7ITnd_Al01Xyp4gdA> >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "Google App Engine" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to [email protected] >>>> <mailto:[email protected]>. >>>> To post to this group, send email to [email protected] >>>> <mailto:[email protected]>. >>>> Visit this group at https://groups.google.com/group/google-appengine >>>> <https://groups.google.com/group/google-appengine>. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/google-appengine/CAD%3DB7cNDQGd%2BJY1ynuPVRECXLKnGmHSQUCGRkYffOndgRnA4wA%40mail.gmail.com >>>> >>>> <https://groups.google.com/d/msgid/google-appengine/CAD%3DB7cNDQGd%2BJY1ynuPVRECXLKnGmHSQUCGRkYffOndgRnA4wA%40mail.gmail.com?utm_medium=email&utm_source=footer>. >>>> For more options, visit https://groups.google.com/d/optout >>>> <https://groups.google.com/d/optout>. >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Google App Engine" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected] >>> <mailto:[email protected]>. >>> To post to this group, send email to [email protected] >>> <mailto:[email protected]>. >>> Visit this group at https://groups.google.com/group/google-appengine >>> <https://groups.google.com/group/google-appengine>. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/google-appengine/6F1FFE0D-FA89-48B4-8AEA-FFE025D49486%40gmail.com >>> >>> <https://groups.google.com/d/msgid/google-appengine/6F1FFE0D-FA89-48B4-8AEA-FFE025D49486%40gmail.com?utm_medium=email&utm_source=footer>. >>> >>> For more options, visit https://groups.google.com/d/optout >>> <https://groups.google.com/d/optout>. >>> >>> >>> >>> -- >>> JOSHUA FOX >>> Principal Software Architect | Freightos >>> >>> >>> >>> ☏ (Israel): +972-545691165 <> | ☏ (US): <> +1-3123400953 <> | Skype: >>> joshuafox.freightos >>> Smoother shipping with the world's online freight marketplace. >>> Online Marketplace >>> <https://www.google.com/url?q=https%3A%2F%2Fwww.freightos.com%2Fcompare-book-manage-freight-quotes%2F&sa=D&sntz=1&usg=AFrqEzfMkBQBWsovNlg47sIDORa5FpHDkQ> >>> / In the News >>> <https://www.google.com/url?q=https%3A%2F%2Fwww.freightos.com%2Fabout-us%2Fin-the-news%2F&sa=D&sntz=1&usg=AFrqEzexnYSKKYuEW4zuC-QrR4X8G53w6Q> >>> / Freightos Blog >>> <http://www.google.com/url?q=http%3A%2F%2Ffreightos.com%2Fresources%2Ffreightos-blog%2F&sa=D&sntz=1&usg=AFrqEzczY9ZxESxvh7ITnd_Al01Xyp4gdA> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Google App Engine" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected] >>> <mailto:[email protected]>. >>> To post to this group, send email to [email protected] >>> <mailto:[email protected]>. >>> Visit this group at https://groups.google.com/group/google-appengine >>> <https://groups.google.com/group/google-appengine>. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/google-appengine/CAD%3DB7cNzKovZhFycUgPv1K1AsMhxyP4buohN23FxpOUaaie0FA%40mail.gmail.com >>> >>> <https://groups.google.com/d/msgid/google-appengine/CAD%3DB7cNzKovZhFycUgPv1K1AsMhxyP4buohN23FxpOUaaie0FA%40mail.gmail.com?utm_medium=email&utm_source=footer>. >>> For more options, visit https://groups.google.com/d/optout >>> <https://groups.google.com/d/optout>. >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] >> <mailto:[email protected]>. >> To post to this group, send email to [email protected] >> <mailto:[email protected]>. >> Visit this group at https://groups.google.com/group/google-appengine >> <https://groups.google.com/group/google-appengine>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/google-appengine/D1643573-A6EB-49BA-9C79-F06597D2EFA8%40gmail.com >> >> <https://groups.google.com/d/msgid/google-appengine/D1643573-A6EB-49BA-9C79-F06597D2EFA8%40gmail.com?utm_medium=email&utm_source=footer>. >> >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. >> >> >> >> -- >> JOSHUA FOX >> Principal Software Architect | Freightos >> >> >> >> ☏ (Israel): +972-545691165 | ☏ (US): <> +1-3123400953 | Skype: >> joshuafox.freightos >> Smoother shipping with the world's online freight marketplace. >> Online Marketplace >> <https://www.google.com/url?q=https%3A%2F%2Fwww.freightos.com%2Fcompare-book-manage-freight-quotes%2F&sa=D&sntz=1&usg=AFrqEzfMkBQBWsovNlg47sIDORa5FpHDkQ> >> / In the News >> <https://www.google.com/url?q=https%3A%2F%2Fwww.freightos.com%2Fabout-us%2Fin-the-news%2F&sa=D&sntz=1&usg=AFrqEzexnYSKKYuEW4zuC-QrR4X8G53w6Q> >> / Freightos Blog >> <http://www.google.com/url?q=http%3A%2F%2Ffreightos.com%2Fresources%2Ffreightos-blog%2F&sa=D&sntz=1&usg=AFrqEzczY9ZxESxvh7ITnd_Al01Xyp4gdA> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] >> <mailto:[email protected]>. >> To post to this group, send email to [email protected] >> <mailto:[email protected]>. >> Visit this group at https://groups.google.com/group/google-appengine >> <https://groups.google.com/group/google-appengine>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/google-appengine/CAD%3DB7cO2GiJX_iWtmYuO0LxtmLxH%2B7QG9%2BoK7TybUPnHPm5LOA%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/google-appengine/CAD%3DB7cO2GiJX_iWtmYuO0LxtmLxH%2B7QG9%2BoK7TybUPnHPm5LOA%40mail.gmail.com?utm_medium=email&utm_source=footer>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at 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To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/5B384747-B3E7-4609-AE22-EF5E8A70EA9F%40gmail.com. For more options, visit https://groups.google.com/d/optout.
