com.bigdata.rdf.sail.webapp.NanoSparqlServer Maven / Gradle / Ivy
/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
[email protected]
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.bigdata.rdf.sail.webapp;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.SocketException;
import java.net.URL;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import javax.servlet.ServletContextListener;
import org.apache.log4j.Logger;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.util.resource.Resource;
import org.eclipse.jetty.webapp.WebAppContext;
import org.eclipse.jetty.xml.XmlConfiguration;
import com.bigdata.Banner;
import com.bigdata.journal.IIndexManager;
import com.bigdata.journal.ITx;
import com.bigdata.journal.Journal;
import com.bigdata.journal.TimestampUtility;
import com.bigdata.resources.IndexManager;
import com.bigdata.util.config.NicUtil;
import com.bigdata.util.httpd.Config;
/**
* Utility class provides a simple SPARQL end point with a REST API.
*
* @author thompsonbry
* @author martyncutcher
*
* @see
* NanoSparqlServer on the wiki.
*
* @see Jetty
* Documentation
*
* @see
* Jetty XML Reference
*
* @see
* Embedding Jetty
*
* @todo If the addressed instance uses full transactions, then mutation should
* also use a full transaction. Does it?
*
* @todo Remote command to advance the read-behind point. This will let people
* bulk load a bunch of stuff before advancing queries to read from the
* new consistent commit point.
*/
public class NanoSparqlServer {
static private final Logger log = Logger.getLogger(NanoSparqlServer.class);
public interface SystemProperties {
/**
* The name of the system property that can be used to override the default
* HTTP port in the bundled jetty.xml file.
*/
String JETTY_PORT = "jetty.port";
/**
* The name of the system property that can be used to override the
* location of the jetty.xml file that will be used to
* configure jetty (default {@value #DEFAULT_JETTY_XML}).
*
* @see
* Allow configuration of embedded NSS jetty server using
* jetty-web.xml
*
* @see #DEFAULT_JETTY_XML
*/
String JETTY_XML = "jettyXml";
/**
* The default value works when deployed under the IDE with the
* bigdata-war/src directory on the classpath. When
* deploying outside of that context, the value needs to be set
* explicitly.
*/
String DEFAULT_JETTY_XML = "jetty.xml";
/**
* The timeout in seconds that we will await the start of the jetty
* {@link Server} (default {@value #DEFAULT_JETTY_START_TIMEOUT}).
*/
String JETTY_STARTUP_TIMEOUT = "jetty.start.timeout";
String DEFAULT_JETTY_STARTUP_TIMEOUT = "10";
/**
* When true, the state of jetty will be dumped onto a
* logger after the server start.
*/
String JETTY_DUMP_START = "jetty.dump.start";
/**
* This property specifies the resource path for the web application. In
* order for this mechanism to work, the jetty.xml file
* MUST contain a line which allows the resourceBase of the web
* application to be set from an environment variable. For example:
*
*
* <SystemProperty name="jetty.resourceBase" default="bigdata-war/src" />
*
*
* The jetty.resourceBase variable may identify either a
* file or a resource on the class path. To force the use of the web
* application embedded within the bigdata.jar you need to
* specify a JAR URL along the following lines (using the appropriate
* file path and jar name and version:
*
*
* jar:file:../lib/bigdata-1.3.0.jar!/bigdata-war/src
*
*
* The use of absolute file paths are recommended for reliable
* resolution.
*
* The order of preference is:
*
* jetty.resourceBase is specified. The value of this
* environment variable will be used to locate the web application.-
*
jetty.resourceBase is not specified (either
* null or whitespace).
*
* - An attempt is made to locate the
bigdata-war/src
* resource in the file system (relative to the current working
* directory). If found, the jetty.resourceBase environment
* variable is set to this resource using a file: style
* URL. This will cause jetty to use the web application directory in
* the file system.
* -
* An attempt is made to locate the resource
*
/WEB-INF/web.xml using the classpath (this handles the
* case when running under the eclipse IDE). If found, the the
* jetty.resourceBase is set to the URL formed by removing
* the trailing WEB-INF/web.xml for the located resource.
* This will cause jetty to use the web application resource on the
* classpath. If there are multiple such resources on the classpath, the
* first such resource will be discovered and used.
* - An attempt is made to locate the resource
*
bigdata-war/src/main/webapp/WEB-INF/web.xml using the classpath
* (this handles the case when running from the command line using a
* bigdata JAR). If found, the the jetty.resourceBase is
* set to the URL formed by the trailing WEB-INF/web.xml
* for the located resource. This will cause jetty to use the web
* application resource on the classpath. If there are multiple such
* resources on the classpath, the first such resource will be
* discovered and used.
* -
* Otherwise, the
jetty.resourceBase environment variable
* is not modified and the default location specified in the
* jetty.xml file will be used. If jetty is unable to
* resolve that resource, then the web application will not start.
*
*
*
* @see NSS does not
* start from command line: bigdata-war/src not found
*/
String JETTY_RESOURCE_BASE = "jetty.resourceBase";
/**
* The location of the override-web.xml resource. The
* default is given in jetty.xml and serves to locate the
* resource when deployed under an IDE. If not explicitly given, value
* of the environment variable is set by the same logic that sets the
* {@link #JETTY_RESOURCE_BASE} environment variable. This allows the
* override-web.xml resource to be found in its default
* location (which is the same directory / package as the
* web.xml file) while still preserving the ability to
* override the location of that resource explicitly by setting the
* environment variable before starting the server.
*
* @see ProxyServlet in
* web.xml breaks tomcat WAR (HA LBS)
*/
String JETTY_OVERRIDE_WEB_XML = "jetty.overrideWebXml";
/**
* The location to over propertyFile used to create the servlet. This
* to allow overriding the default value via passing a Java Property at
* the command line.
*/
String BIGDATA_PROPERTY_FILE = "bigdata.propertyFile";
/**
* The jetty.home property.
*/
String JETTY_HOME = "jetty.home";
}
/**
* Run an httpd service exposing a SPARQL endpoint. The service will respond
* to the following URL paths:
*
* - http://localhost:port/
* - The SPARQL end point for the default namespace as specified by the
*
namespace command line argument.
* - http://localhost:port/namespace/NAMESPACE
* - where
NAMESPACE is the namespace of some triple store or
* quad store, may be used to address ANY triple or quads store in the
* bigdata instance.
* - http://localhost:port/status
* - A status page.
*
*
* @param args
* USAGE:
* To start the server:
* (options) port namespace (propertyFile|configFile) )
*
* Where:
*
* - port
* - The port on which the service will respond -or-
*
0 to use any open port.
* - namespace
* - The namespace of the default SPARQL endpoint (the
* namespace will be
kb if none was specified when
* the triple/quad store was created).
* - propertyFile
* - A java properties file for a standalone {@link Journal}.
* - configFile
* - A jini configuration file for a bigdata federation.
*
* and options are any of:
*
* - -jettyXml
* - The location of the jetty.xml resource that will be used
* to start the {@link Server} (default is the file in the JAR).
* The default will locate the
jetty.xml resource
* that is bundled with the JAR. This preserves the historical
* behavior. If you want to use a different
* jetty.xml file, just override this property on
* the command line -or- specify the
* {@link NanoSparqlServer.SystemProperties#JETTY_XML} system
* property.
* - -nthreads
* - The #of threads which will be used to answer SPARQL
* queries (default
* {@value ConfigParams#DEFAULT_QUERY_THREAD_POOL_SIZE}).
* - -forceOverflow
* - Force a compacting merge of all shards on all data
* services in a bigdata federation (this option should only be
* used for benchmarking purposes).
* - -readLock
* - The commit time against which the server will assert a
* read lock by holding open a read-only transaction against that
* commit point OR
-1 (MINUS ONE) to assert a read
* lock against the last commit point. When given, queries will
* default to read against this commit point. Otherwise queries
* will default to read against the most recent commit point on
* the database. Regardless, each query will be issued against a
* read-only transaction.
* - -servletContextListenerClass
* - The name of a class that extends
* {@link BigdataRDFServletContextListener}. This allows you to
* hook the {@link ServletContextListener} events.
*
*
*/
// * bufferCapacity [#bytes]
// * Specify the capacity of the buffers used to decouple the
// * query evaluation from the consumption of the HTTP response by
// * the client. The capacity may be specified in bytes or
// * kilobytes, e.g., 5k.
public static void main(final String[] args) throws Exception {
Banner.banner();
int port = 80;
String namespace = "kb";
int queryThreadPoolSize = ConfigParams.DEFAULT_QUERY_THREAD_POOL_SIZE;
boolean forceOverflow = false;
Long readLock = null;
/*
* Note: This default will locate the jetty.xml resource that is bundled
* with the JAR. This preserves the historical behavior. If you want to
* use a different jetty.xml file, just override this property on the
* command line.
*/
String jettyXml = System.getProperty(//
SystemProperties.JETTY_XML,//
"jetty.xml"//
// SystemProperties.DEFAULT_JETTY_XML
);
// Set the resource base to inside of the jar file if jetty.home is not set
// This is for running as the executable jar
if (System.getProperty(SystemProperties.JETTY_HOME) == null) {
final URL jettyJarXml = jettyXml.getClass().getResource("/war");
System.setProperty(SystemProperties.JETTY_HOME,
jettyJarXml.toExternalForm());
// Also set the Jetty Resource Base to this value, if it is not
// configured.
if (System.getProperty(SystemProperties.JETTY_RESOURCE_BASE) == null) {
System.setProperty(SystemProperties.JETTY_RESOURCE_BASE,
jettyJarXml.toExternalForm());
}
}
/*
* Handle all arguments starting with "-". These should appear before
* any non-option arguments to the program.
*/
int i = 0;
while (i < args.length) {
final String arg = args[i];
if (arg.startsWith("-")) {
if (arg.equals("-forceOverflow")) {
forceOverflow = true;
} else if (arg.equals("-nthreads")) {
final String s = args[++i];
queryThreadPoolSize = Integer.valueOf(s);
if (queryThreadPoolSize < 0) {
usage(1/* status */,
"-nthreads must be non-negative, not: " + s);
}
} else if (arg.equals("-readLock")) {
final String s = args[++i];
readLock = Long.valueOf(s);
if (readLock != ITx.READ_COMMITTED
&& !TimestampUtility.isCommitTime(readLock
.longValue())) {
usage(1/* status */,
"Read lock must be commit time or -1 (MINUS ONE) to assert a read lock on the last commit time: "
+ readLock);
}
} else if (arg.equals("-jettyXml")) {
jettyXml = args[++i];
} else {
usage(1/* status */, "Unknown argument: " + arg);
}
} else {
break;
}
i++;
}
/*
* Finally, there should be exactly THREE (3) command line arguments
* remaining. These are the [port], the [namespace] and the
* [propertyFile] (journal) or [configFile] (scale-out).
*/
final int nremaining = args.length - i;
if (nremaining != 3) {
/*
* There are either too many or too few arguments remaining.
*/
usage(1/* status */, nremaining < 3 ? "Too few arguments."
: "Too many arguments");
}
/*
* http service port.
*/
{
final String s = args[i++];
try {
port = Integer.valueOf(s);
} catch (NumberFormatException ex) {
usage(1/* status */, "Could not parse as port# : '" + s + "'");
}
}
/*
* Namespace.
*/
namespace = args[i++];
// Note: This is checked by the ServletContextListener.
// /*
// * Property file.
// */
final String propertyFile = args[i++];
//Through an Exception is the propertyFile does not exist.
final File pFile = new File(propertyFile);
if(!pFile.exists()) {
final String errMsg = "Property or config file " + propertyFile
+ " does not exist and is a required parameter.";
System.err.println(errMsg);
log.error(errMsg);
throw new RuntimeException(errMsg);
}
// final File file = new File(propertyFile);
// if (!file.exists()) {
// throw new RuntimeException("Could not find file: " + file);
// }
// boolean isJini = false;
// if (propertyFile.endsWith(".config")) {
// // scale-out.
// isJini = true;
// } else if (propertyFile.endsWith(".properties")) {
// // local journal.
// isJini = false;
// } else {
// /*
// * Note: This is a hack, but we are recognizing the jini
// * configuration file with a .config extension and the journal
// * properties file with a .properties extension.
// */
// usage(1/* status */,
// "File should have '.config' or '.properties' extension: "
// + file);
// }
/*
* Setup the ServletContext properties.
*/
final Map initParams = new LinkedHashMap();
initParams.put(
ConfigParams.PROPERTY_FILE,
propertyFile);
initParams.put(ConfigParams.NAMESPACE,
namespace);
initParams.put(ConfigParams.QUERY_THREAD_POOL_SIZE,
Integer.toString(queryThreadPoolSize));
initParams.put(
ConfigParams.FORCE_OVERFLOW,
Boolean.toString(forceOverflow));
if (readLock != null) {
initParams.put(
ConfigParams.READ_LOCK,
Long.toString(readLock));
}
// Create the service.
final Server server = NanoSparqlServer.newInstance(port, jettyXml,
null/* indexManager */, initParams);
awaitServerStart(server);
// Wait for the service to terminate.
server.join();
}
/**
* Await a {@link Server} start up to a timeout.
*
* @parma server The {@link Server} to start.
* @throws InterruptedException
* @throws TimeoutException
* @throws Exception
*/
public static void awaitServerStart(final Server server)
throws InterruptedException, TimeoutException, Exception {
// Note: Does not appear to help.
//
// final WebAppContext wac = getWebApp(server);
//
// if (wac == null)
// throw new Exception("WebApp is not available?");
final long timeout = Long.parseLong(System.getProperty(
SystemProperties.JETTY_STARTUP_TIMEOUT,
SystemProperties.DEFAULT_JETTY_STARTUP_TIMEOUT));
boolean ok = false;
final long begin = System.nanoTime();
final long nanos = TimeUnit.SECONDS.toNanos(timeout);
long remaining = nanos;
try {
// Start Server.
log.warn("Starting NSS");
server.start();
// Await running.
remaining = nanos - (System.nanoTime() - begin);
while (server.isStarting() && !server.isRunning()
/* && !wac.isRunning() */ && remaining > 0) {
Thread.sleep(100/* ms */);
// remaining = nanos - (now - begin) [aka elapsed]
remaining = nanos - (System.nanoTime() - begin);
}
if (remaining < 0) {
throw new TimeoutException();
}
// if (!wac.isRunning())
// throw new Exception("WebApp is not running?");
ok = true;
} finally {
if (!ok) {
// Complain if Server did not start.
final String msg = "Server did not start.";
System.err.println(msg);
log.fatal(msg);
if (server != null) {
/*
* Support the jetty dump-after-start semantics.
*/
if (Boolean.getBoolean(SystemProperties.JETTY_DUMP_START)) {
log.warn(server.dump());
}
server.stop();
server.destroy();
}
}
}
/*
* Support the jetty dump-after-start semantics.
*/
if (Boolean.getBoolean(SystemProperties.JETTY_DUMP_START)) {
log.warn(server.dump());
}
/*
* Report *an* effective URL of this service.
*
* Note: This is an effective local URL (and only one of them, and even
* then only one for the first connector). It does not reflect any
* knowledge about the desired external deployment URL for the service
* end point.
*/
final String serviceURL;
{
final int actualPort = getLocalPort(server);
String hostAddr = getHost();
serviceURL = new URL("http", hostAddr, actualPort, ""/* file */)
.toExternalForm();
final String msg = "serviceURL: " + serviceURL;
System.out.println(msg);
if (log.isInfoEnabled())
log.warn(msg);
}
}
/**
* Utility method to get the host for the currently running NSS.
* If {@link NicUtil} returns a null pointer, it is set to the
* value of {@link Config#DEFAULT_HOST}.
*
* @return The hostname for the running instance.
*
* @throws SocketException
* @throws IOException
*/
protected static String getHost() throws SocketException, IOException {
String hostAddr = NicUtil.getIpAddress("default.nic", "default",
true/* loopbackOk */);
if (hostAddr == null) {
hostAddr = Config.DEFAULT_HOST;
}
return hostAddr;
}
/**
* Start the embedded {@link Server}.
*
* Note: The port override argument given here is applied by setting the
* {@link NanoSparqlServer.SystemProperties#JETTY_PORT} System property. The
* old value of that property is restored afterwards, but there is a
* side-effect which could be visible to concurrent threads.
*
* @param port
* The port on which the service will run -OR- ZERO (0) for any
* open port.
* @param indexManager
* The {@link IIndexManager} (optional).
* @param initParams
* Initialization parameters for the web application as specified
* by {@link ConfigParams} (optional).
*
* @return The server instance.
*
* @see SystemProperties
*/
static public Server newInstance(final int port,
final IIndexManager indexManager,
final Map initParams) throws Exception {
// The jetty.xml resource to be used.
final String jettyXml = System.getProperty(SystemProperties.JETTY_XML,
SystemProperties.DEFAULT_JETTY_XML);
return newInstance(port, jettyXml, indexManager, initParams);
}
/**
* Start the embedded {@link Server}.
*
* Note: The port override argument given here is applied by setting the
* {@link NanoSparqlServer.SystemProperties#JETTY_PORT} System property. The
* old value of that property is restored afterwards, but there is a
* side-effect which could be visible to concurrent threads.
*
* @param port
* The port on which the service will run -OR- ZERO (0) for any
* open port.
* @param jettyXml
* The location of the jetty.xml resource.
* @param indexManager
* The {@link IIndexManager} (optional).
* @param initParams
* Initialization parameters for the web application as specified
* by {@link ConfigParams} (optional).
*
* @return The server instance.
*
* @see SystemProperties
*/
synchronized// synchronized to avoid having the side-effect on the port visible to concurrent jetty starts.
static public Server newInstance(final int port,
final String jettyXml,
final IIndexManager indexManager,
final Map initParams) throws Exception {
if (jettyXml == null)
throw new IllegalArgumentException();
// Set the property to override the value in jetty.xml.
final String oldport = System.setProperty(SystemProperties.JETTY_PORT,
Integer.toString(port));
try {
return newInstance(jettyXml, indexManager, initParams);
} finally {
if (oldport != null) {
// Restore the old value for the port.
System.setProperty(SystemProperties.JETTY_PORT, oldport);
}
}
}
/**
* Variant used when you already have the {@link IIndexManager}.
*
* When the optional {@link IIndexManager} argument is specified, it will be
* set as an attribute on the {@link WebAppContext}. This will cause the
* webapp to use the pre-existing {@link IIndexManager} rather than
* attempting to open a new {@link IIndexManager} based on the
* propertyFile init parameter specified in
* web.xml. The HA initialization pattern relies on this.
*
* When the {@link IIndexManager} is NOT specified, the life cycle of the
* {@link IIndexManager} will be managed by the server and the
* {@link IndexManager} instance will be opened (and eventually closed) by
* the {@link BigdataRDFServletContextListener} based on the configured
* value of the propertyFile init parameter in
* web.xml. This form is used by {@link #main(String[])} and
* can be used with either the {@link Journal} or the scale-out
* architecture.
*
* @param jettyXml
* The jetty.xml file that will be used to configure
* jetty.
* @param indexManager
* The {@link IIndexManager} (optional).
* @param initParams
* Optional map containing overrides for the init parameters
* declared in web.xml.
*
* @return The server instance.
*
* @see
* Allow configuration of embedded NSS jetty server using jetty-web.xml
*
*/
static public Server newInstance(//
final String jettyXml,//
final IIndexManager indexManager,//
final Map initParams//
) throws Exception {
if (jettyXml == null)
throw new IllegalArgumentException();
// Used to search the classpath for jetty.xml.
final ClassLoader classLoader = NanoSparqlServer.class
.getClassLoader();
// final ClassLoader classLoader = indexManager.getClass()
// .getClassLoader();
/*
* Configure the jetty Server using a jetty.xml file. In turn, the
* jetty.xml file configures the webapp using a web.xml file. The caller
* can override the location of the jetty.xml file using the [jetty.xml]
* environment variable if they need to change the way in which either
* jetty or the webapp are configured. You can also override many of the
* properties in the [jetty.xml] file using environment variables. For
* example, they can also override the location of the web application
* (including the web.xml file) using the [jetty.resourceBase]
* environment variable.
*/
final Server server;
{
// Find the effective jetty.xml URL.
final URL jettyXmlURL = getEffectiveJettyXmlURL(classLoader,
jettyXml);
// Build the server configuration from that jetty.xml resource.
final XmlConfiguration configuration;
{
// Open jetty.xml resource.
final Resource jettyConfig = Resource.newResource(jettyXmlURL);
InputStream is = null;
try {
is = jettyConfig.getInputStream();
// Build configuration.
configuration = new XmlConfiguration(is);
} finally {
if (is != null) {
is.close();
}
}
}
// Configure/apply jetty.resourceBase overrides.
configureEffectiveResourceBase(classLoader);
// Configure the jetty server.
server = (Server) configuration.configure();
}
/*
* Configure any overrides for the web application init-params.
*/
configureWebAppOverrides(server, indexManager, initParams);
return server;
}
private static URL getEffectiveJettyXmlURL(final ClassLoader classLoader,
final String jettyXml) throws MalformedURLException {
// Locate jetty.xml.
URL jettyXmlUrl;
boolean isFile = false;
boolean isClassPath = false;
if (new File(jettyXml).exists()) {
// Check the file system.
jettyXmlUrl = new URL("file:" + jettyXml);
isFile = true;
} else {
// Check the classpath.
jettyXmlUrl = classLoader.getResource(jettyXml);
if(jettyXmlUrl == null)
{
jettyXmlUrl = classLoader.getResource("/" + jettyXml);
}
isClassPath = true;
}
// See BLZG-1447
// Check if it is running as a test suite in Eclipse or Maven.
// If it is running as maven surefire execution the target/bigdata.war
// will exist.
final File warFile = new File("target/bigdata.war");
if (jettyXmlUrl == null && warFile.exists()) {
// This is the maven surefire plugin case.
jettyXmlUrl = classLoader.getResource("jetty/jettyMavenTest.xml");
} else if (jettyXmlUrl == null) {
jettyXmlUrl = classLoader.getResource("jetty/jettyEclipseTest.xml");
}
//If we still didn't get it, we may be running the executable jar.
if (jettyXmlUrl == null) { // This is the executable jar a file
// reference into the jar
jettyXmlUrl = classLoader.getResource("jetty.xml");
isFile = true;
}
if (jettyXmlUrl == null) {
if(jettyXmlUrl == null)
throw new RuntimeException("Not found: " + jettyXml);
}
if (log.isInfoEnabled())
log.info("jetty configuration: jettyXml=" + jettyXml + ", isFile="
+ isFile + ", isClassPath=" + isClassPath
+ ", jettyXmlUrl=" + jettyXmlUrl);
return jettyXmlUrl;
}
/**
* Search (a) the local file system; and (b) the classpath for the web
* application. If the resource is located, then set the
* [jetty.resourceBase] property. This search sequence gives preference to
* the local file system and then searches the classpath (which jetty does
* not known how to do by itself.)
*
* @throws MalformedURLException
*
* @see NSS does not start
* from command line: bigdata-war/src not found
*/
private static void configureEffectiveResourceBase(
final ClassLoader classLoader) throws MalformedURLException {
// Check the environment variable.
String resourceBaseStr = System
.getProperty(SystemProperties.JETTY_RESOURCE_BASE);
//Try JETTY_HOME if the Resource Base is null
if(resourceBaseStr == null ) {
resourceBaseStr = System
.getProperty(SystemProperties.JETTY_HOME);
}
// Check the environment variable for the override web.
final String jettyOverrideWeb = System
.getProperty(SystemProperties.JETTY_OVERRIDE_WEB_XML);
// true iff declared as an environment variable.
final boolean isDeclared = resourceBaseStr != null
&& resourceBaseStr.trim().length() > 0;
boolean isFile = false; // iff found in local file system.
boolean isClassPath = false; // iff found on classpath.
if (!isDeclared) {
/*
* jetty.resourceBase not declared in the environment.
*/
// The default location to check in the file system.
final File file = new File("bigdata-war-html/src/main/webapp/");
final URL resourceBaseURL;
if (file.exists()) {
// Check the file system. See #1108
// resourceBaseURL = new URL("file:" + file.getAbsolutePath());
resourceBaseURL = file.toURI().toURL();
isFile = true;
} else {
/*
* Check the classpath.
*
* Note: When checking the classpath we need to test different
* resources depending on whether we are running under the
* eclipse IDE or at the command line!
*/
URL tmp = null;
String src = null;
if (tmp == null) {
/**
* Eclipse IDE class path.
*
* Note: This is what gets found when running under eclipse.
* The URL will be in the configured build directory for the
* eclipse project. So, something like:
*
*
* file:/Users/bryan/Documents/workspace/BIGDATA_RELEASE_1_3_0_NEW_SVN/bin/WEB-INF/web.xml
*
*/
tmp = ClassLoader.getSystemClassLoader().getResource(
src = "bigdata-war-html/src/main/webapp/WEB-INF/web.xml");
}
// if (tmp == null)// Eclipse IDE class path (system class loader).
// tmp = ClassLoader.getSystemClassLoader().getResource(
// src = "WEB-INF/web.xml");
// if (tmp == null)
// tmp = classLoader // JAR class path.
// .getResource(src = "/bigdata-war/src/WEB-INF/web.xml");
if (tmp == null) {
/**
* JAR class path (system class loader).
*
* Note: This is what gets located when we run from the
* command line (outside of eclipse). The resulting JAR URL
* will be something like:
*
*
* jar:file:/Users/bryan/Documents/workspace/BIGDATA_RELEASE_1_3_0_NEW_SVN/ant-build/lib/bigdata-1.3.0-20140517.jar!/bigdata-war/src/WEB-INF/web.xml
*
*/
tmp = ClassLoader.getSystemClassLoader().getResource(
src = "war/src/main/webapp/WEB-INF/web.xml");
}
if (tmp != null) {
if (src != null) {
if(log.isInfoEnabled())
log.info("Found: src=" + src + ", url=" + tmp);
}
resourceBaseURL = new URL(trimURISubstring(tmp,"WEB-INF/web.xml"));
} else {
resourceBaseURL = null;
}
isClassPath = resourceBaseURL != null;
}
if (resourceBaseURL != null) {
/*
* We found the resource either in the file system or in the
* classpath.
*
* Explicitly set the discovered value on the jetty.resourceBase
* property. This will cause jetty to use the version of that
* resource that we discovered above.
*
* Note: If we did not find the resource, then the default value
* from the jetty.xml SystemProperty expression will be used by
* jetty. If it can not find a resource using that default
* value, then the startup will fail. We leave this final check
* to jetty itself since it will interpret the jetty.xml file
* itself.
*/
resourceBaseStr = resourceBaseURL.toExternalForm();
System.setProperty(SystemProperties.JETTY_RESOURCE_BASE,
resourceBaseStr);
}
}
//Don't override the value if it is explicitly declared.
//If we have a resource base, but not a declared jetty override
//use the WEB-INF/override-web.xml as the default.
if (resourceBaseStr != null && jettyOverrideWeb == null) {
final URL overrideWebXmlURL = new URL(resourceBaseStr
+ (resourceBaseStr.endsWith("/") ? "" : "/")
+ "WEB-INF/override-web.xml");
System.setProperty(SystemProperties.JETTY_OVERRIDE_WEB_XML,
overrideWebXmlURL.toExternalForm());
}
if (log.isInfoEnabled())
log.info("jetty configuration"//
+ ": resourceBaseStr=" + resourceBaseStr
+ ", isDeclared="
+ isDeclared + ", isFile=" + isFile
+ ", isClassPath="
+ isClassPath
+ ", jetty.resourceBase(effective)="
+ System.getProperty(SystemProperties.JETTY_RESOURCE_BASE)
+ ", jetty.overrideWebXml(effective)="
+ System.getProperty(SystemProperties.JETTY_OVERRIDE_WEB_XML));
}
/**
* Convenience method to prune last substring occurance from URL.
* @param src
* @param sub
* @return
*/
final static String trimURISubstring(URL src, String sub) {
final String s = src.toExternalForm();
final int endIndex = s.lastIndexOf(sub);
final String t = s.substring(0, endIndex);
return t;
}
/**
* Configure the webapp (overrides, IIndexManager, etc.)
*
* Note: These overrides are achieved by setting the {@link WebAppContext}
* attribute named
* {@link BigdataRDFServletContextListener#INIT_PARAM_OVERRIDES}. The
* {@link BigdataRDFServletContextListener} then consults the attribute when
* reporting the effective value of the init-params. This convoluted
* mechanism is required because you can not otherwise override the
* init-params without editing web.xml.
*/
private static void configureWebAppOverrides(//
final Server server,//
final IIndexManager indexManager,//
final Map initParams//
) {
final WebAppContext wac = getWebApp(server);
if (wac == null) {
/*
* This is a fatal error. If we can not set the IIndexManager, the
* NSS will try to interpret the propertyFile in web.xml rather than
* using the one that is already open and specified by the caller.
* Among other things, that breaks the HAJournalServer startup.
*/
throw new RuntimeException("Could not locate "
+ WebAppContext.class.getName());
}
/*
* Force the use of the caller's IIndexManager. This is how we get the
* NSS to use the already open Journal for the HAJournalServer.
*/
if (indexManager != null) {
// Set the IIndexManager attribute on the WebAppContext.
wac.setAttribute(IIndexManager.class.getName(), indexManager);
}
/*
* Note: You simply can not override the init parameters specified in
* web.xml. Therefore, this sets the overrides on an attribute. The
* attribute is then consulted when the web app starts and its the
* override values are used if given.
*/
if (initParams != null) {
wac.setAttribute(
BigdataRDFServletContextListener.INIT_PARAM_OVERRIDES,
initParams);
}
}
/**
* Return the {@link WebAppContext} for the {@link Server}.
*
* @param server
* The {@link Server}.
*
* @return The {@link WebAppContext} associated with the bigdata webapp.
*/
public static WebAppContext getWebApp(final Server server) {
final WebAppContext wac = server
.getChildHandlerByClass(WebAppContext.class);
/*
* Note: This assumes that this is the webapp for bigdata. If there are
* multiple webapps then this assumption is no longer valid and things
* will break.
*/
return wac;
}
/**
* Best effort attempt to return the port at which the local jetty
* {@link Server} is receiving http connections.
*
* @param server
* The server.
*
* @return The local port.
*
* @throws IllegalArgumentException
* if the argument is null.
*/
public static int getLocalPort(final Server server) {
if (server == null)
throw new IllegalArgumentException();
final Connector[] a = server.getConnectors();
if (a.length == 0) {
/*
* This will happen if there are no configured connectors in
* jetty.xml, jetty-http.xml, etc.
*/
throw new IllegalStateException("No connectors?");
}
return ((ServerConnector) a[0]).getLocalPort();
}
/**
* Print the optional message on stderr, print the usage information on
* stderr, and then force the program to exit with the given status code.
*
* @param status
* The status code.
* @param msg
* The optional message
*/
protected static void usage(final int status, final String msg) {
if (msg != null) {
System.err.println(msg);
}
System.err
.println("[options] port namespace (propertyFile|configFile)");
System.exit(status);
}
}