caching

问题 I have an action which I cache using caches_action :my_action, :expires_in=>1.hours and also set the expires headers in the action itself using def my_action ... expires_in 1.hours send_data(...,:disposition => 'inline',:type => 'image/png',:filename => params[:title]+".png") end However, when I look at the cache control response header from a result that is coming as the result of a memcached hit, I get this: Cache-Control: private, max-age=0, must-revalidate The first time round, i.e. when

问题 I needed to find a way that two applications can use the same cache, and after some quick research it seems that we will need a distributed cache to achieve this. Further Googling turns up a number of solutions, NCache, SharedCache, Velocity, memcached. This cache will be used for caching webpages in a Microsoft Enviroment using Asp.Net 3.5. So my question is what experiences do you have with these, or other, technologies. 回答1: We have been using Memcached for some time now and it works like

问题 I am Creating an app where the user can login from FaceBook or Twitter. After login, the user is directed to some HomePage. And here, controller loads and my initial function is called which loads data specific to that user. When user clicks on Log Out. The tokens are cleared and user is directed to SignIn Page. Now without closing the app, if the user SignIn again using twitter, The user is directed to same homepage. The Scope of that controller has the same data. I know Ionic uses cache to

问题 I am Creating an app where the user can login from FaceBook or Twitter. After login, the user is directed to some HomePage. And here, controller loads and my initial function is called which loads data specific to that user. When user clicks on Log Out. The tokens are cleared and user is directed to SignIn Page. Now without closing the app, if the user SignIn again using twitter, The user is directed to same homepage. The Scope of that controller has the same data. I know Ionic uses cache to

问题 In my mini project i'm trying to crop an already uploaded image and then show the cropped image in place of the original image in the gallery page. But after I'm done with cropping i'm shown the the original image when i'm redirected to the gallery page even refreshing the page doesn't work. I have to clear the browser's cache in order to see the cropped image. Can i clear the browser's cache using jQuery? 回答1: Just go through this link, it is not possible to clear cache but can prevent it by

问题 I have used AWS API Gateway with the endpoint as a lambda function. I have enabled the cache functionality provided by API Gateway, to reduce both response time & the number of calls forwarded to my lambda function. The lambda function queries another data store to return data. If data is not found, an asynchronous call is made to update the data store and "data not found" is returned to the caller. Now the API Gateway is even caching this result, which we do not want to happen. This results

问题 I just found Guava by searching for a cache API (it fits perfectly for my needs). But one question arose on reading the wiki and Javadoc - what are the default values of settings the CacheBuilder can take? The Javadoc states "These features are all optional" and "Constructs a new CacheBuilder instance with default settings, including strong keys, strong values, and no automatic eviction of any kind." In my opinion, a good default for maximumSize would be relative to Runtime.getRuntime()

问题 I just found Guava by searching for a cache API (it fits perfectly for my needs). But one question arose on reading the wiki and Javadoc - what are the default values of settings the CacheBuilder can take? The Javadoc states "These features are all optional" and "Constructs a new CacheBuilder instance with default settings, including strong keys, strong values, and no automatic eviction of any kind." In my opinion, a good default for maximumSize would be relative to Runtime.getRuntime()

问题 I want to convert the following sql query to Elasticsearch one. can any one help in this. select csgg, sum(amount) from table1 where type in ('a','b','c') and year=2016 and fc="33" group by csgg having sum(amount)=0 I tried following way: enter code here { "size": 500, "query" : { "constant_score" : { "filter" : { "bool" : { "must" : [ {"term" : {"fc" : "33"}}, {"term" : {"year" : 2016}} ], "should" : [ {"terms" : {"type" : ["a","b","c"] }} ] } } } }, "aggs": { "group_by_csgg": { "terms": {

问题 I have system with Hibernate, Spring, PostgreSQL, MongoDB, Neo4j and ElasticSearch working with EhCache for Hibernate L2 and Spring Cache, it works well. I'm testing Ignite but the system became extremely slow when I put Ignite for Hibernate L2 (with Spring Cache works fast), I put JProfiler to see what is really slow and I just saw the follow methods extremely slow: org.postgresql.core.VisibleBufferedInputStream.read(byte[ ], int, int) org.postgresql.jdbc2.AbstractJdbc2Statement.parseSql