Who owns this outage? Building intelligent escalation chains for modern SRE. Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer. Visit chat. Related Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled. But the 1. That's happening because the maven downloaded all the versions from the 1.
Basically I would like to download just the latest from the 1. First don't use versions ranges cause they make your build non reproducible..
If you like to update things like that you can use versions-maven-plugin to update the dependency. Apart from that what is the difference between 1. From your explanations i would assume you should change your versions schema cause the second one is not compatible with the first one so I would say 2.
Coming to you explanations: I have my doubts that all artifacts are being downloaded If you take a look at the logging output I assume there are some line saying How are we doing? Please help us improve Stack Overflow.
Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? The two important scenarios where dependencies on Oracle-provided Maven artifacts are specified are as following:. The version number range should be specified in both the scenarios. This section describes how version number ranges are specified in Oracle-provided artifacts and when you are declaring a dependency on an Oracle-provided artifact. When specifying dependencies on other artifacts, the most specific correct syntax should be used to ensure that the definition does not allow an incorrect or unsuitable version of the dependency to be used.
As Table shows, the previous example means that the latest available version is The version number scheme used by Oracle-provided artifacts ensures correct sorting of version numbers, for example, Maven will resolve the following versions in the order shown from oldest to newest :.
If it is necessary to specify a dependency which relies on a certain PatchSet or Bundle Patch, for example, when a new API is introduced, you must include the fourth or fourth and fifth digits respectively.
For example: 1. For example, Maven arranges the version list in the following manner: 1. Multiple sets are separated by a comma. The periods and hyphens are literals. Note: The version numbers of artifacts as specified in project. In [x. The version number scheme used by Oracle-provided artifacts ensures correct sorting of version numbers, for example, Maven will resolve the following versions in the order shown from oldest to newest : For example: [ It generally means 1.
This gives a sequence of version numbers numeric tokens and version qualifiers non-numeric tokens with ". Then, starting from the end of the version, the trailing "null" values 0 , "" , " final ", " ga " are trimmed.
This process is repeated at each remaining hyphen from end to start. The version order is the lexicographical order on this sequence of prefixed tokens, the shorter one padded with enough "null" values with matching prefix to have the same length as the longer one. Padded "null" values depend on the prefix of the other version: 0 for '. The prefixed token order is:. Note: Contrary to what was stated in some design documents, for version order, snapshots are not treated differently than releases or any other qualifier.
The maven distribution includes a tool to check version order. It was used to produce the examples in the previous paragraphs. Feel free to run it yourself when in doubt. You can run it like this:. Exclusions tell Maven not to include the specified project that is a dependency of this dependency in other words, its transitive dependency.
For example, the maven-embedder requires maven-core , and we do not wish to use it or its dependencies, then we would add it as an exclusion. It is also sometimes useful to clip a dependency's transitive dependencies. A dependency may have incorrectly specified scopes, or dependencies that conflict with other dependencies in your project. Using wildcard excludes makes it easy to exclude all a dependency's transitive dependencies. In the case below you may be working with the maven-embedder and you want to manage the dependencies you use yourself, so you clip all the transitive dependencies:.
One powerful addition that Maven brings to build management is the concept of project inheritance. Although in build systems such as Ant inheritance can be simulated, Maven makes project inheritance explicit in the project object model.
The packaging type required to be pom for parent and aggregation multi-module projects. These types define the goals bound to a set of lifecycle stages. For example, if packaging is jar , then the package phase will execute the jar:jar goal. Now we may add values to the parent POM, which will be inherited by its children. Most elements from the parent POM are inherited by its children, including:. Notice the relativePath element. It is not required, but may be used as a signifier to Maven to first search the path given for this project's parent, before searching the local and then remote repositories.
Similar to the inheritance of objects in object oriented programming, POMs that extend a parent POM inherit certain values from that parent. Moreover, just as Java objects ultimately inherit from java. Besides inheriting certain top-level elements, parents have elements to configure values for child POMs and transitive dependencies. One of those elements is dependencyManagement. Note that the version and scope of artifacts which are incorporated from transitive dependencies are also controlled by version specifications in a dependency management section.
This can lead to unexpected consequences. Consider a case in which your project uses two dependences, dep1 and dep2. If you then use dependencyManagement to specify an older version, dep2 will be forced to use the older version, and fail. So, you must be careful to check the entire dependency tree to avoid this problem; mvn dependency:tree is helpful. A project with modules is known as a multi-module, or aggregator project.
Modules are projects that this POM lists, and are executed as a group. A pom packaged project may aggregate the build of a set of projects by listing them as modules, which are relative paths to the directories or the POM files of those projects. You do not need to consider the inter-module dependencies yourself when listing the modules; i. Maven will topologically sort the modules such that dependencies are always build before dependent modules.
Inheritance and aggregation create a nice dynamic to control builds through a single, high-level POM. You often see projects that are both parents and aggregators. For example, the entire Maven core runs through a single base POM org. However, an aggregator project and a parent project are both POM projects, they are not one and the same and should not be confused. A POM project may be inherited from - but does not necessarily have - any modules that it aggregates.
Conversely, a POM project may aggregate projects that do not inherit from it. Properties are the last required piece to understand POM basics. Maven properties are value placeholders, like properties in Ant. Or they can be used by plugins as default values, for example:.
Note: While environment variables themselves are case-insensitive on Windows, lookup of properties is case-sensitive. The names of environment variables are normalized to all upper-case for the sake of reliability.
Beyond the basics of the POM given above, there are two more elements that must be understood before claiming basic competency of the POM. They are the build element, that handles things like declaring your project's directory structure and managing plugins; and the reporting element, that largely mirrors the build element for reporting purposes.
According to the POM 4. Let us begin with an analysis of the common elements between the two. Note: These different build elements may be denoted "project build" and "profile build". BaseBuild is exactly as it sounds: the base set of elements between the two build elements in the POM. For a more comprehensive look at what filters are and what they can do, take a look at the quick start guide.
Another feature of build elements is specifying where resources exist within your project. Resources are not usually code. They are not compiled, but are items meant to be bundled within your project or used for various other reasons, such as code generation. For example, a Plexus project requires a configuration.
In order for the JAR plugin to bundle the resource correctly, you would specify resources similar to the following:. Beyond the standard coordinate of groupId:artifactId:version , there are elements which configure the plugin or this builds interaction with it.
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