[sanselan] Unable to read jpeg comment field
I have 2 images, one has almost no metadata (no EXIF), it just has the JPEG Comment field set (not to be confused with the exif user comment field). When I try to read metadata from it: IImageMetadata meta = Sanselan.getMetadata(file); it returns null. The other picture is a picture from my camera (Canon EOS1000), which has lots of metadata. I've set the JPEG comment on this image with exiftool (exiftool -comment=foo file.jpg), I read the metadata: IImageMetadata meta = Sanselan.getMetadata(file); the metadata is a JpegImageMetadata object, I go trough everything in meta.getItems(), and meta.getExif().getAllField() without finding the jpeg comment. meta.getPhotoshop() is empty, and meta.getRawImageData() returns null. Is there a way to get the JPEG comment with sanselan? - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [sanselan] Unable to read jpeg comment field
On Thu, Dec 8, 2011 at 2:38 PM, Erlend Aakre erlend.aa...@q-free.comwrote: I have 2 images, one has almost no metadata (no EXIF), it just has the JPEG Comment field set (not to be confused with the exif user comment field). When I try to read metadata from it: IImageMetadata meta = Sanselan.getMetadata(file); it returns null. The other picture is a picture from my camera (Canon EOS1000), which has lots of metadata. I've set the JPEG comment on this image with exiftool (exiftool -comment=foo file.jpg), I read the metadata: IImageMetadata meta = Sanselan.getMetadata(file); the metadata is a JpegImageMetadata object, I go trough everything in meta.getItems(), and meta.getExif().getAllField() without finding the jpeg comment. meta.getPhotoshop() is empty, and meta.getRawImageData() returns null. Is there a way to get the JPEG comment with sanselan? I'm checking. If not, I'll make you a patch. Can you email me an image to test with? Regards Damjan
[configuration] Common-configuration is not compatible with apache-lang-3.X
Hello, We recently upgraded our apache-common-lang library from 2.4 to 3. But some classes of apache-common-configuration rely on classes that are not part of apache-common-lang anymore. (ConfigurationException depends on NestableException for example) - http://commons.apache.org/lang/article3_0.html I can't find any information on that issue, am I the only one in this situation ? What can I do ? Does apache-common-configuration will be modified to be compatible with apache-common-lang-3 ? Best regards, --- Ivan Boelle
Re: [sanselan] Unable to read jpeg comment field
Here is the program I was using and the file that has metadata.
1test.jpg has only the JPEG Comment (view by using exiftool for
example), when I run the attached ExifTest.java program I get a null
metadata object.
vegas.jpg is from a camera, I get metadata but can not find the comment
(JPEG COM) anywhere in it
Regards
Erlend
I'm checking. If not, I'll make you a patch. Can you email me an image to
test with?
Regards
Damjan
import java.io.File;
import javax.swing.JOptionPane;
import org.apache.sanselan.Sanselan;
import org.apache.sanselan.common.IImageMetadata;
import org.apache.sanselan.formats.jpeg.JpegImageMetadata;
import org.apache.sanselan.formats.tiff.TiffField;
import org.apache.sanselan.formats.tiff.TiffImageMetadata;
public class ExifTest {
public static void main(String[] args) {
String filename = ;
if (args.length != 1) {
filename = JOptionPane.showInputDialog(Enter filename);
} else {
filename = args[0];
}
File file = new File(filename);
if (!file.exists() || !file.canRead()) {
System.out.println(File not found or not readable: + file.getAbsolutePath());
System.exit(0);
}
try {
IImageMetadata meta = Sanselan.getMetadata(file);
System.out.println(got metadata = + meta);
//ImageInfo info = Sanselan.getImageInfo(file);
//System.out.println( info, # of comments = + info.getComments().size() );
//info.dump();
printMetaData(meta);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void printMetaData(IImageMetadata meta) throws Exception {
if (meta instanceof JpegImageMetadata) {
// write all items
System.out.println(ITEMS: + meta.getItems().size());
System.out.println(==);
for (Object o : meta.getItems()) {
System.out.println( item: + o);
}
// write all exif data
TiffImageMetadata exif = ((JpegImageMetadata) meta).getExif();
System.out.println(\n\n\n\n\n\n\nEXIF: + exif.getAllFields().size());
for (Object o : exif.getAllFields()) {
TiffField f = (TiffField) o;
System.out.println(+ f.getDescriptionWithoutValue() + = + f.getValue());
}
} else if(meta == null) {
System.out.println(META is null);
}
else {
System.out.println(Unsupported image type (not jpeg): + meta.getClass());
}
}
}
-
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Re: [configuration] Common-configuration is not compatible with apache-lang-3.X
Hi Ivan, Ivan Boelle wrote: Hello, We recently upgraded our apache-common-lang library from 2.4 to 3. But some classes of apache-common-configuration rely on classes that are not part of apache-common-lang anymore. c-lang and c-lang3 are designed to be used side-by-side, since they are binary incompatible. You cannot expect that anything using c-lang is immediately ported to c-lang3. (ConfigurationException depends on NestableException for example) - http://commons.apache.org/lang/article3_0.html I can't find any information on that issue, am I the only one in this situation ? What can I do ? Use c-lang for c-configurations. However, nothing prevents you from using c- lang3 in *your* code. Does apache-common-configuration will be modified to be compatible with apache-common-lang-3 ? Development of a version using Java 5 has started some days ago, so may take quite some time for it to be finished. - Jörg - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [sanselan] Unable to read jpeg comment field
No, Sanselan didn't have any way to read comments in the last released version. But I just committed a patch to SVN trunk (revision 1211882) that supports reading JPEG comments with: Sanselan.getImageInfo().getComments() If you can't check out and compile SVN, let me know and I can email you a new Sanselan JAR. Regards Damjan On Thu, Dec 8, 2011 at 3:19 PM, Erlend Aakre erlend.aa...@q-free.comwrote: Here is the program I was using and the file that has metadata. 1test.jpg has only the JPEG Comment (view by using exiftool for example), when I run the attached ExifTest.java program I get a null metadata object. vegas.jpg is from a camera, I get metadata but can not find the comment (JPEG COM) anywhere in it Regards Erlend I'm checking. If not, I'll make you a patch. Can you email me an image to test with? Regards Damjan - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [sanselan] Unable to read jpeg comment field
If you can't check out and compile SVN, let me know and I can email you a new Sanselan JAR. Regards Damjan I've checked it out from svn, I tried building it with mvn -Prc package, but that gives the following warning at first: [WARNING] Some problems were encountered while building the effective model for org.apache.commons:commons-sanselan:jar:0.98-SNAPSHOT [WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-idea-plugin is missing. @ org.apache.commons:commons-parent:17, /home/erlend/.m2/repository/org/apache/commons/commons-parent/17/commons-parent-17.pom, line 317, column 15 [WARNING] [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. [WARNING] [WARNING] For this reason, future Maven versions might no longer support building such malformed projects. and the following tests fail: Failed tests: testInsert(org.apache.sanselan.formats.jpeg.exif.ExifRewriteTest) testRewriteLossy(org.apache.sanselan.formats.jpeg.exif.ExifRewriteTest) testRewriteLossless(org.apache.sanselan.formats.jpeg.exif.ExifRewriteTest) Mvn -version: Apache Maven 3.0.3 (r1075438; 2011-02-28 18:31:09+0100) Maven home: /home/erlend/apache-maven-3.0.3 Java version: 1.6.0_21, vendor: Sun Microsystems Inc. Java home: /home/erlend/jdk1.6.0_21/jre Default locale: en_US, platform encoding: UTF-8 OS name: linux, version: 2.6.32-34-generic-pae, arch: i386, family: unix No .jar files are generated in the target directory - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [dbcp] Handling many different user accounts over time
On Wed, Dec 7, 2011 at 11:27 AM, Cameron, Scott scott.came...@sap.com wrote: Hi, I'm considering using either SharedPoolDataSource or PerUserPoolDataSource to do some connection pooling but I've noticed that there doesn't seem to be any way to configure an upper bound on the total number of connections in the pool across all users. What do you mean, across all users? Do you have different connection strings (user/pass) for each person who connects to your database? For example, say I have 5,000 named users in my database. Any of the 5,000 can come in to request a DB connection at any time, but likely no more than, say, 100 of them will ever be active at a particular point in time. If I want to allow 3 connections per user, how do I ensure that I'm not eventually going to end up with 15,000 open connection over time. It looks like the maxTotal setting on the GenericObjectPool (and GenericKeyedObjectPool) can be used to control this such that when this absolute upper bound is reached on the pool the least recently used 15% of connections will be recycled. But neither SharedPoolDataSource nor PerUserPoolDataSource expose any way to configure maxTotal. Is there another recommended way to solve this problem? What do high-traffic web containers like Tomcat or JBoss do to deal with this scenario (if they do deal with it)? Do I understand correctly, if I show up to your site as user wspeirs, then I'm connecting to your database as wspeirs? If so, then why wouldn't you simply create a connection for that user and store it in the user's session? When the session is destroyed, you close the connection. There is a bit more start-up time in creating the connection when they first show up, but it'll be live and active during the rest of the time they are there. That work for you? Bill- - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
RE: [dbcp] Handling many different user accounts over time
What do you mean, across all users? Do you have different connection strings (user/pass) for each person who connects to your database? It's a slightly mixed bag as the app is multi-tenanted. We have some connection strings used by nearly everybody for certain things. Some connection strings are assigned to an organization and will be used by all users in that org. And some connection strings are unique for each individual user. Do I understand correctly, if I show up to your site as user wspeirs, then I'm connecting to your database as wspeirs? If so, then why wouldn't you simply create a connection for that user and store it in the user's session? When the session is destroyed, you close the connection. There is a bit more start-up time in creating the connection when they first show up, but it'll be live and active during the rest of the time they are there. Even if the connections weren't sometimes shared across users, the component that manages connections doesn't have any knowledge of application-level concepts like session. It's job is just to manage connections, which can potentially have a different lifecycle than session. We're thinking that maybe we can rely on maxIdle to evict unused connections. The downside to this is that the default minimum idle time before eviction is 30 minutes and can't be configured. But maybe that will be OK. It would be nice to have more control over the object pool inside the pooled data source classes as that seems to be where most of the interesting tweakable pooling features live. But only a very small number of options are exposed to data source consumers. -- scott - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
RE: [dbcp] Handling many different user accounts over time
If you have specific ideas, open a JIRA ticket and we can look into it. Bill- On Dec 8, 2011 5:52 PM, Cameron, Scott scott.came...@sap.com wrote: What do you mean, across all users? Do you have different connection strings (user/pass) for each person who connects to your database? It's a slightly mixed bag as the app is multi-tenanted. We have some connection strings used by nearly everybody for certain things. Some connection strings are assigned to an organization and will be used by all users in that org. And some connection strings are unique for each individual user. Do I understand correctly, if I show up to your site as user wspeirs, then I'm connecting to your database as wspeirs? If so, then why wouldn't you simply create a connection for that user and store it in the user's session? When the session is destroyed, you close the connection. There is a bit more start-up time in creating the connection when they first show up, but it'll be live and active during the rest of the time they are there. Even if the connections weren't sometimes shared across users, the component that manages connections doesn't have any knowledge of application-level concepts like session. It's job is just to manage connections, which can potentially have a different lifecycle than session. We're thinking that maybe we can rely on maxIdle to evict unused connections. The downside to this is that the default minimum idle time before eviction is 30 minutes and can't be configured. But maybe that will be OK. It would be nice to have more control over the object pool inside the pooled data source classes as that seems to be where most of the interesting tweakable pooling features live. But only a very small number of options are exposed to data source consumers. -- scott - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
RE: [dbcp] Handling many different user accounts over time
If you have specific ideas, open a JIRA ticket and we can look into it. It seems like everything we want to customize to get the behavior we want is actually at the ObjectPool level. So I was wondering why not expose deeper access to that? It seems like it would provide a lot more flexibility without necessarily changing the DataSource-specific aspects of the class. But maybe there are issues with this I'm not thinking about. I was thinking about posting something to the Developer list asking about this. But do you think JIRA is a better avenue? Thanks for your assistance. -- scott - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
[math] Complex Tanh for big numbers
Hi,
In Complex.java the tanh is computed with the following formula:
tanh(a + bi) = sinh(2a)/(cosh(2a)+cos(2b)) + [sin(2b)/(cosh(2a)+cos(2b))]i
The problem that I'm finding is that as soon as a is a big number,
both sinh(2a) and cosh(2a) are infinity and then the method tanh returns in
the real part NaN (infinity/infinity) when it should return 1.0.
Wouldn't it be appropiate to add something as in the FastMath library??:
if (real20.0){
return createComplex(1.0, 0.0);
}
if (real-20.0){
return createComplex(-1.0, 0.0);
}
Best regards,
JBB
