org.mule.runtime.module.artifact.classloader.net

Class MuleArtifactUrlConnection

java.lang.Object

java.net.URLConnection

org.mule.runtime.module.artifact.classloader.net.MuleArtifactUrlConnection

public class MuleArtifactUrlConnection
extends URLConnection

A URL Connection to a Mule Artifact file or an entry in a Mule Artifact file.

The syntax of a Mule Artifact URL is (current support for protocols under URL are described in SUPPORTED_PROTOCOLS):

 muleartifact:<url>!/{entry}
 

Where "url" is targeting a ZIP type of file to be decompressed, and the subsequent N-1 elements in "{entry}" are zips as well and the N element is the file to look for. That means the getInputStream() will open as many zips as needed to look for the file.

valid samples:

muleartifact:file:/folder/mule-plugin.zip!/classes!/org/foo/echo/aResource.txt

muleartifact:file:/folder/mule-plugin.zip!/lib/test-jar-with-resources.jar!/test-resource-2.txt

invalid samples:

muleartifact:file:/folder/mule-plugin.zip

muleartifact:file:/folder/mule-plugin.zip!/

muleartifact:http:/folder/mule-plugin.zip!/classes/org/foo/echo/aResource.txt (protocol is 'http')

Notice that after the URL targeting the ZIP file, there must be several separators '!/' elements, due to the fact that this class is meant to open every ZIP until it finds out the expected file. TODO(fernandezlautaro): MULE-10892 at some moment this class should be strong enough to support any type of artifact.

Since:

4.0

Field Summary

Fields

Modifier and Type	Field and Description
static String	CLASSES_FOLDER
static String	SEPARATOR

Fields inherited from class java.net.URLConnection

allowUserInteraction, connected, doInput, doOutput, ifModifiedSince, url, useCaches

Constructor Summary

Constructors

Constructor and Description
MuleArtifactUrlConnection(URL url) Takes an URL to validate its format in the connect() ()} method, if there aren't any problem, it will store the ZIP file in artifactZip and all the files that are accessible from that starting point.

Method Summary

Modifier and Type	Method and Description
void	connect() Given the URL that was feed in the MuleArtifactUrlConnection(URL) constructor, it will validate its format through the parseSpecs() method.
InputStream	getInputStream() Returns an input stream that represents the element in the url from the farthest SEPARATOR mark.

Methods inherited from class java.net.URLConnection

addRequestProperty, getAllowUserInteraction, getConnectTimeout, getContent, getContent, getContentEncoding, getContentLength, getContentLengthLong, getContentType, getDate, getDefaultAllowUserInteraction, getDefaultRequestProperty, getDefaultUseCaches, getDoInput, getDoOutput, getExpiration, getFileNameMap, getHeaderField, getHeaderField, getHeaderFieldDate, getHeaderFieldInt, getHeaderFieldKey, getHeaderFieldLong, getHeaderFields, getIfModifiedSince, getLastModified, getOutputStream, getPermission, getReadTimeout, getRequestProperties, getRequestProperty, getURL, getUseCaches, guessContentTypeFromName, guessContentTypeFromStream, setAllowUserInteraction, setConnectTimeout, setContentHandlerFactory, setDefaultAllowUserInteraction, setDefaultRequestProperty, setDefaultUseCaches, setDoInput, setDoOutput, setFileNameMap, setIfModifiedSince, setReadTimeout, setRequestProperty, setUseCaches, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

SEPARATOR

public static final String SEPARATOR

See Also:

Constant Field Values

CLASSES_FOLDER

public static final String CLASSES_FOLDER

See Also:

Constant Field Values

Constructor Detail

MuleArtifactUrlConnection

public MuleArtifactUrlConnection(URL url)

Takes an URL to validate its format in the connect() ()} method, if there aren't any problem, it will store the ZIP file in artifactZip and all the files that are accessible from that starting point.

Method Detail

connect

public void connect()
             throws IOException

Given the URL that was feed in the MuleArtifactUrlConnection(URL) constructor, it will validate its format through the parseSpecs() method.

If there aren't any problem during validation, it will store a ZIP file in artifactZip and all the subsequent files that are accessible from that starting point.

Specified by:

connect in class URLConnection

Throws:

IOException - if the first element is not a ZIP file, or if the protocol is not supported, or if it's impossible to create a ZipFile from the parsed url, or if there's not at least a SEPARATOR in the url.

getInputStream

public InputStream getInputStream()
                           throws IOException

Returns an input stream that represents the element in the url from the farthest SEPARATOR mark. For the following URL samples:

muleartifact:file:/folder/mule-plugin.zip!/classes!/org/foo/echo/aResource.txt

muleartifact:file:/folder/mule-plugin.zip!/lib/test-jar-with-resources.jar!/test-resource-2.txt The expected input streams will be the content of "org/foo/echo/aResource.txt" and "test-resource-2.txt" respectively.

Overrides:

getInputStream in class URLConnection

Returns:

an input stream that represents the element in the url from the farthest SEPARATOR mark.

Throws:

IOException