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new f33caad3 Add instruction about how to set a custom `DataSource` for
connection to EPSG database.
f33caad3 is described below
commit f33caad388dbb685172e01bcb27dca077beb3500
Author: Martin Desruisseaux <[email protected]>
AuthorDate: Thu Aug 4 18:03:23 2022 +0200
Add instruction about how to set a custom `DataSource` for connection to
EPSG database.
---
source/epsg.md | 61 ++++++++++++++++++++++++++++++++++++++++++++--------------
1 file changed, 47 insertions(+), 14 deletions(-)
diff --git a/source/epsg.md b/source/epsg.md
index 119a5dd1..62949234 100644
--- a/source/epsg.md
+++ b/source/epsg.md
@@ -31,6 +31,9 @@ In order to use the EPSG geodetic dataset with Apache {{% SIS
%}}, apply *one* o
# Install a local copy with command-line tool {#command-line}
+The installation process described in this section makes clear that EPSG
dataset
+is distributed under a different license and asks users for their agreement.
+This process can be used with the [Apache SIS {{% version %}} binary
bundle](downloads.html#bundles).
If the [command-line tool](command-line.html) has been downloaded and
installed, just query any CRS.
For example:
@@ -38,34 +41,39 @@ For example:
sis crs EPSG:6676
{{< / highlight >}}
-The first time that the command-line tool needs to query EPSG, it will prompt
the user for authorization
-to download EPSG geodetic dataset from Maven Central. If the user accepts EPSG
terms of use, then a local
-copy of the EPSG geodetic dataset will be created and stored in the
`apache-sis-{{% version %}}/data` sub-directory.
+Alternatively if the [JavaFX application](javafx.html) is used, just start the
application.
+It may be necessary to open a random data file for triggering the EPSG dataset
initialization.
+In both cases, the first time that the command-line tool or JavaFX application
needs to query EPSG,
+it will prompt the user for authorization to download EPSG geodetic dataset
from Maven Central.
+If the user accepts EPSG terms of use, then a local copy of the EPSG geodetic
dataset will be created
+and stored in the `apache-sis-{{% version %}}/data` sub-directory.
-## Use the local copy in other applications {#use-local}
+## How to use the local copy in other applications {#use-local}
+The EPSG dataset installed by the command-line tools or the JavaFX application
can also be used with other applications.
For using the installed EPSG geodetic dataset in your own application, apply
*one* of the following choices:
* Set the `SIS_DATA` environment variable to the path of `apache-sis-{{%
version %}}/data` directory _(recommended)_.
* Set the `derby.system.home` Java property to the path of `apache-sis-{{%
version %}}/data/Databases` directory.
-Alternatively `SIS_DATA` or `derby.system.home` can be set to the path of any
other directory which contain the same files.
Examples are shown below for Unix systems, assuming that the current directory
is the directory where `apache-sis-{{% version %}}-bin.zip`
-has been unzipped:
+has been unzipped (replace `myApp` and `MyMainClass` by the application to
launch):
{{< highlight bash >}}
export SIS_DATA=apache-sis-{{% version %}}/data
-java -classpath apache-sis-{{% version %}}/lib/sis-referencing.jar:myApp.jar
myMainClass
+java --class-path apache-sis-{{% version %}}/lib/sis-referencing.jar:myApp.jar
MyMainClass
{{< / highlight >}}
If the `SIS_DATA` environment variable can not be set, Java property can be
used as a fallback:
{{< highlight bash >}}
java -Dderby.system.home=apache-sis-{{% version %}}/data/Databases \
- -classpath apache-sis-{{% version %}}/lib/sis-referencing.jar:myApp.jar \
- myMainClass
+ --class-path apache-sis-{{% version %}}/lib/sis-referencing.jar:myApp.jar
\
+ MyMainClass
{{< / highlight >}}
+Alternatively `SIS_DATA` or `derby.system.home` can be set to the path of any
other directory which contain the same files.
+
# Add a Maven dependency {#maven}
Maven projects can get the EPSG geodetic dataset automatically, _without any
prompt for terms of use agreement_,
@@ -143,17 +151,42 @@ the JAR file is distributed on the Maven repository in
its compressed form.
If desired, better performance can be achieved by using one of the other
configurations described in this page,
or by uncompressing the `sis-embedded-data.jar` file locally.
-# Use Java Naming and Directory Interface {#jndi}
+# Manually setup an EPSG database
-While Apache {{% SIS %}} uses Apache Derby by default, it is also possible to
use another database software like HSQL or PostgreSQL.
-For using an arbitrary database, register a `javax.sql.DataSource` instance
through the Java Naming and Directory Interface (JNDI).
-That registration can be done programmatically (by Java code) or by
configuring XML files in some environments.
+Applications can use their own EPSG database.
+In addition of Derby, Apache {{% SIS %}} is also tested on HSQL and PostgreSQL.
+For using an arbitrary database, register a `javax.sql.DataSource` instance
through one of the methods described below.
The database must exist but can be empty, in which case it will be populated
with an EPSG schema when first needed
if the <code style="white-space:normal">org.apache.sis.non-free:sis-epsg:{{%
version %}}</code> dependency is on the classpath
(see [above section](#maven-epsg)).
+If non-empty, the database should contain the tables created by SQL scripts
downloaded from [EPSG][EPSG].
+**Note thas as of Apache SIS 1.2, only EPSG dataset version 9 is supported.
+EPSG datasets version 10 and later are not yet supported.**
+
+## Registration by Java code {#setup}
+
+The data source can be specified by Java code as below
+(replace the `main` method by any method where initialization occurs):
+
+{{< highlight java >}}
+import javax.sql.DataSource;
+import org.apache.sis.setup.Configuration;
+
+public void MyApp {
+ public static void main(String[] args) {
+ Configuration.current().setDatabase(MyApp::createDataSource);
+ }
+
+ private static DataSource createDataSource() {
+ DataSource ds = ...; // Initialize the data source here.
+ return ds;
+ }
+}
+{{< / highlight >}}
-## Registration by Java code {#jndi-java}
+## Registration by Java Naming and Directory Interface {#jndi-java}
+Registration in JNDI can be done programmatically (by Java code) or by
configuring XML files in some environments.
Registration can be done by the following Java code, provided that a JNDI
implementation is available on the classpath:
{{< highlight java >}}
