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@KlausBrunner
KlausBrunner / SimpleFuture.java
Created Nov 19, 2012
A very simple implementation of the Java Future interface, for passing a single value to some waiting thread. Uses a CountdownLatch to ensure thread safety and provide blocking-with-timeout functionality required by Future. Cancellation isn't supported.
View SimpleFuture.java
public final class ResultFuture implements Future<Result> {
private final CountDownLatch latch = new CountDownLatch(1);
private Result value;
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
return false;
}
@Override
@KlausBrunner
KlausBrunner / counters.cql
Created Nov 20, 2012
creating and using a Cassandra counter column in CQL
View counters.cql
-- creating and using a Cassandra counter column in CQL
-- NOTE: this is CQL 2.0 syntax, it will NOT work with CQL 3 (for syntax reasons and because CQL 3.0 drops the very notion of dynamic columns...sigh)
CREATE KEYSPACE test WITH strategy_class = 'SimpleStrategy'
AND strategy_options:replication_factor = '1';
USE test;
CREATE TABLE stats (KEY text PRIMARY KEY) WITH comparator=text AND default_validation=counter;
@KlausBrunner
KlausBrunner / varnishncsa-request-time-vs-master.patch
Last active Oct 13, 2015
Add %D to log complete request time (beginning to end) in varnishncsa. Patches against varnish master & 3.0.3.
View varnishncsa-request-time-vs-master.patch
diff --git a/bin/varnishncsa/varnishncsa.c b/bin/varnishncsa/varnishncsa.c
index 0b039b6..10664c7 100644
--- a/bin/varnishncsa/varnishncsa.c
+++ b/bin/varnishncsa/varnishncsa.c
@@ -39,6 +39,7 @@
* %l Client user ID as reported by identd (always "-")
* %u User ID if using HTTP authentication, or "-"
* %t Date and time of request
+ * %D time from beginning to completion of request
* %r Request line
@KlausBrunner
KlausBrunner / wars-dist.xml
Created Dec 20, 2012
Maven assembly plugin descriptor to bundle all WAR dependencies into a zip file, including local resource files. This is useful when you don't use EARs, but still want to package several web applications into one big archive, plus any additional stuff (e.g. configuration files) needed for deployment.
View wars-dist.xml
<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
<!-- A Maven assembly plugin descriptor to bundle all WAR dependencies into a zip file, including local
resource files. This is useful when you don't use EARs, but still want to package several web applications
into one big archive, plus any additional stuff (e.g. configuration files) needed for deployment. -->
<id>dist</id>
<formats>
<format>zip</format>
@KlausBrunner
KlausBrunner / pullall.py
Last active Dec 10, 2015
Pull all the Mercurial repos listed in the TortoiseHg registry. Convenient if you're tracking lots of repositories.
View pullall.py
#!/usr/bin/env python
"""
Pull all the Mercurial repos listed in the TortoiseHg registry, in parallel.
Convenient if you're tracking lots of repositories.
"""
from __future__ import print_function
import subprocess
@KlausBrunner
KlausBrunner / asset_template.json
Last active Dec 11, 2015
Elasticsearch issue with phonetic plugin and index templates (stored in config). Tested with elasticsearch-analysis-phonetic 1.1.0 and 1.2.0 on both Linux and Windows on ES 0.19.12 and 0.20.2. Summary: it works without using a template, it works with a template added through the template API, but consistently fails with a template that is stored…
View asset_template.json
{
"asset_template": {
"template": "*",
"settings": {
"analysis": {
"filter": {
"metaphone_filter": {
"replace": false,
"encoder": "doublemetaphone",
"type": "phonetic"
@KlausBrunner
KlausBrunner / Unzipper.java
Last active Sep 2, 2018
Extracts files and directories of a standard zip file to a destination directory. Requires at least Java 7.
View Unzipper.java
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;
import static java.nio.file.Files.*;
/**
* Extracts files and directories of a standard zip file to a destination directory. Requires at least Java 7.
*/
@KlausBrunner
KlausBrunner / web.xml
Created Dec 6, 2013
web.xml used with cditest, patched weld on jetty-9.1.[01]
View web.xml
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<listener>
<listener-class>org.jboss.weld.environment.servlet.BeanManagerResourceBindingListener</listener-class>
</listener>
<listener>
@KlausBrunner
KlausBrunner / dump1.txt
Last active Dec 30, 2015
Cassandra 1.2.11 OOMs during relatively high read load, possibly around/in compaction?
View dump1.txt
ERROR [ReadStage:51] 2013-12-06 00:02:54,065 CassandraDaemon.java (line 191) Exception in thread Thread[ReadStage:51,5,main]
ERROR [ReadStage:51] 2013-12-06 00:02:54,065 CassandraDaemon.java (line 191) Exception in thread Thread[ReadStage:51,5,main]
java.lang.OutOfMemoryError: Java heap space
at org.apache.cassandra.io.util.RandomAccessReader.readBytes(RandomAccessReader.java:376)
at org.apache.cassandra.utils.ByteBufferUtil.read(ByteBufferUtil.java:392)
at org.apache.cassandra.utils.ByteBufferUtil.readWithLength(ByteBufferUtil.java:355)
at org.apache.cassandra.db.ColumnSerializer.deserializeColumnBody(ColumnSerializer.java:108)
at org.apache.cassandra.db.OnDiskAtom$Serializer.deserializeFromSSTable(OnDiskAtom.java:92)
at org.apache.cassandra.db.OnDiskAtom$Serializer.deserializeFromSSTable(OnDiskAtom.java:73)
at org.apache.cassandra.db.columniterator.SimpleSliceReader.computeNext(SimpleSliceReader.java:106)
@KlausBrunner
KlausBrunner / stacktraces.txt
Created Dec 13, 2013
postconstruct method on ServletListener called multiple times (on separate instances)
View stacktraces.txt
POST CONSTRUCT ON LISTENER CALLED test.ContextListener@1cadc928
java.lang.Throwable
at test.ContextListener.myPostConstructMethod(ContextListener.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.eclipse.jetty.plus.annotation.LifeCycleCallback.callback(LifeCycleCallback.java:117)
at org.eclipse.jetty.plus.annotation.PostConstructCallback.callback(PostConstructCallback.java:57)
at org.eclipse.jetty.plus.annotation.LifeCycleCallbackCollection.callPostConstructCallback(LifeCycleCallbackCollection.java:115)
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