datasource

问题 I'm trying to figure out how my Spring app can determine where it is deployed and load the appropriate datasource. We have 3 environments...my local, the development server, and the production server. So far I have 3 properties files called localhost.datasource.properties development.datasource.properties production.datasource.properties I have them conifgured like this: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3

问题 I made a small application with spring-boot, spring jpa data, that connects to a dockerized postgres instace and it works pretty fine, even if I try to connect via 'psql' to the dockerized postgres instace it works well. The porblem is when I try to dockerize an image's instance of my spring-boot application and I try to link it with the dockerized postegres instance. The docker command I use is this docker run -it --link mypgcontainerwithpwd:postgres --name postgresclient1 sprinbootjpa As a

问题 I'm trying to find out how to use a string collection as a datasource in JasperReports. I guess I found the solution, but I can't get this to work, can anyone assist me? set as datasource the special data source JREmptyDatasource( $F{my_collection}.size() ) This creates an empty data set with the same size of records as the collection. Pass the $F{my_collection} as parameter to the sub dataset (using the data set run of the List). To print the current element of the collection: $P{my

问题 I'm trying to find out how to use a string collection as a datasource in JasperReports. I guess I found the solution, but I can't get this to work, can anyone assist me? set as datasource the special data source JREmptyDatasource( $F{my_collection}.size() ) This creates an empty data set with the same size of records as the collection. Pass the $F{my_collection} as parameter to the sub dataset (using the data set run of the List). To print the current element of the collection: $P{my

问题 since I've installed mysql connector 6.7.4 and Update 3 for Visual Studio 2012 the MySQL Connector is gone away from the Connection Manager dialog. It was a working project, so the data source configuration is correct. But when I open my existing *.edmx file I get an error (see the picture below). I've tried to reinstall the connector with rebooting between each installation step, controlled the GAC but I cannot get the connector working back again. I believe it is related to the Update 3, as

问题 The JDBC Tutorial recommends using a DataSource object to obtain database connections rather than using the DriverManager class. To quote the Connecting with DataSource Objects page: DataSource objects … the preferred means of getting a connection to a data source. How do I get such an object for a JDBC connection to Postgres? I have a JDBC driver in place. Right now, I do not want to fiddle around with JNDI like this or this. Can I instantiate a DataSource programmatically within my Java app

问题 I've gone through several question, this is somewhat related but doesn't answer my question. Does the c3p0 connection pooling maxPoolSize ensures that the number of connections at a certain time never exceeds this limit? What if the maxPoolSize=5 and 10 users start using the app exactly at the same time? My app. configurations <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="driverClass"><value>${database.driverClassName}</value>

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 6 years ago . I want to make Cookbook application for storing and reading (and updating) recipes, or anything else to practice OOP programming and thinking. But, I am not sure, what way of storing data, in this case, recipes, is the best in c# (Visual Studio Express). I want to optimize

问题 I'm trying to test a class in a Spring project. I would like to make as many changes as possible in the test class vs. the dao class so that I don't have to retest all sorts things because of a change. The class I'm working with has a JdbcTemplate template class variable that is instantiated by the following: setJdbcTemplate(DataSource dataSource) { this.template = new JdbcTemplate(dataSource); } The method I would like to test makes a template.query(<code>) to run a defined SQL query and

问题 I'm reading about JNDI and DataSource. https://www.journaldev.com/2509/java-datasource-jdbc-datasource-example https://www.journaldev.com/2513/tomcat-datasource-jndi-example-java https://www.baeldung.com/jndi Does it make sense to use JNDI without a server, e.g. Tomcat, JBoss, WAS? Is there some simple, standalone application that uses JNDI? I would like an example using both without a server. import java.rmi.Remote; import java.rmi.RemoteException; import java.rmi.registry.LocateRegistry;