| package org.apache.commons.vfs.provider.webdav; |
| |
| import org.apache.commons.httpclient.HostConfiguration; |
| import org.apache.commons.httpclient.HttpConnection; |
| import org.apache.commons.httpclient.HttpConnectionManager; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| /** |
| * A connection manager that provides access to a single HttpConnection. This |
| * manager makes no attempt to provide exclusive access to the contained |
| * HttpConnection. |
| * <p/> |
| * imario@apache.org: Keep connection in ThreadLocal. |
| * |
| * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a> |
| * @author <a href="mailto:becke@u.washington.edu">Michael Becke</a> |
| * @author Eric Johnson |
| * @author <a href="mailto:mbowler@GargoyleSoftware.com">Mike Bowler</a> |
| * @author <a href="mailto:oleg@ural.ru">Oleg Kalnichevski</a> |
| * @author Laura Werner |
| * @since 2.0 |
| */ |
| public class WebdavConnectionManager implements HttpConnectionManager |
| { |
| private static class ConnectionParameters |
| { |
| private boolean staleCheck; |
| |
| public boolean isStaleCheckingEnabled() |
| { |
| return staleCheck; |
| } |
| |
| public void setStaleCheckingEnabled(boolean b) |
| { |
| staleCheck = b; |
| } |
| |
| public void populateParameters(HttpConnection connection) |
| { |
| connection.setStaleCheckingEnabled(staleCheck); |
| } |
| } |
| |
| /** |
| * Since the same connection is about to be reused, make sure the |
| * previous request was completely processed, and if not |
| * consume it now. |
| * |
| * @param conn The connection |
| */ |
| static void finishLastResponse(HttpConnection conn) |
| { |
| InputStream lastResponse = conn.getLastResponseInputStream(); |
| if (lastResponse != null) |
| { |
| conn.setLastResponseInputStream(null); |
| try |
| { |
| lastResponse.close(); |
| } |
| catch (IOException ioe) |
| { |
| //FIXME: badness - close to force reconnect. |
| conn.close(); |
| } |
| } |
| } |
| |
| /** |
| * The thread data |
| */ |
| protected ThreadLocal localHttpConnection = new ThreadLocal() |
| { |
| protected Object initialValue() |
| { |
| return new Entry(); |
| } |
| }; |
| |
| /** |
| * Collection of parameters associated with this connection manager. |
| */ |
| private ConnectionParameters params = new ConnectionParameters(); |
| |
| /** |
| * release the connection of the current thread |
| */ |
| public void releaseLocalConnection() |
| { |
| if (getLocalHttpConnection() != null) |
| { |
| releaseConnection(getLocalHttpConnection()); |
| } |
| } |
| |
| private static class Entry |
| { |
| /** |
| * The http connection |
| */ |
| private HttpConnection conn = null; |
| |
| /** |
| * The time the connection was made idle. |
| */ |
| private long idleStartTime = Long.MAX_VALUE; |
| } |
| |
| public WebdavConnectionManager() |
| { |
| } |
| |
| protected HttpConnection getLocalHttpConnection() |
| { |
| return ((Entry) localHttpConnection.get()).conn; |
| } |
| |
| protected void setLocalHttpConnection(HttpConnection conn) |
| { |
| ((Entry) localHttpConnection.get()).conn = conn; |
| } |
| |
| protected long getIdleStartTime() |
| { |
| return ((Entry) localHttpConnection.get()).idleStartTime; |
| } |
| |
| protected void setIdleStartTime(long idleStartTime) |
| { |
| ((Entry) localHttpConnection.get()).idleStartTime = idleStartTime; |
| } |
| |
| /** |
| * @see HttpConnectionManager#getConnection(org.apache.commons.httpclient.HostConfiguration) |
| */ |
| public HttpConnection getConnection(HostConfiguration hostConfiguration) |
| { |
| return getConnection(hostConfiguration, 0); |
| } |
| |
| /** |
| * Gets the staleCheckingEnabled value to be set on HttpConnections that are created. |
| * |
| * @return <code>true</code> if stale checking will be enabled on HttpConections |
| * @see HttpConnection#isStaleCheckingEnabled() |
| * @deprecated Use {@link HttpConnectionManagerParams#isStaleCheckingEnabled()}, |
| * {@link HttpConnectionManager#getParams()}. |
| */ |
| public boolean isConnectionStaleCheckingEnabled() |
| { |
| return this.params.isStaleCheckingEnabled(); |
| } |
| |
| /** |
| * Sets the staleCheckingEnabled value to be set on HttpConnections that are created. |
| * |
| * @param connectionStaleCheckingEnabled <code>true</code> if stale checking will be enabled |
| * on HttpConections |
| * @see HttpConnection#setStaleCheckingEnabled(boolean) |
| * @deprecated Use {@link HttpConnectionManagerParams#setStaleCheckingEnabled(boolean)}, |
| * {@link HttpConnectionManager#getParams()}. |
| */ |
| public void setConnectionStaleCheckingEnabled(boolean connectionStaleCheckingEnabled) |
| { |
| this.params.setStaleCheckingEnabled(connectionStaleCheckingEnabled); |
| } |
| |
| /** |
| * @see HttpConnectionManager#getConnection(HostConfiguration, long) |
| * @since 3.0 |
| */ |
| public HttpConnection getConnectionWithTimeout( |
| HostConfiguration hostConfiguration, long timeout) |
| { |
| |
| HttpConnection httpConnection = getLocalHttpConnection(); |
| if (httpConnection == null) |
| { |
| httpConnection = new HttpConnection(hostConfiguration); |
| setLocalHttpConnection(httpConnection); |
| httpConnection.setHttpConnectionManager(this); |
| this.params.populateParameters(httpConnection); |
| } |
| else |
| { |
| |
| // make sure the host and proxy are correct for this connection |
| // close it and set the values if they are not |
| if (!hostConfiguration.hostEquals(httpConnection) |
| || !hostConfiguration.proxyEquals(httpConnection)) |
| { |
| |
| if (httpConnection.isOpen()) |
| { |
| httpConnection.close(); |
| } |
| |
| httpConnection.setHost(hostConfiguration.getHost()); |
| httpConnection.setPort(hostConfiguration.getPort()); |
| httpConnection.setProtocol(hostConfiguration.getProtocol()); |
| httpConnection.setLocalAddress(hostConfiguration.getLocalAddress()); |
| |
| httpConnection.setProxyHost(hostConfiguration.getProxyHost()); |
| httpConnection.setProxyPort(hostConfiguration.getProxyPort()); |
| } |
| else |
| { |
| finishLastResponse(httpConnection); |
| } |
| } |
| |
| // remove the connection from the timeout handler |
| setIdleStartTime(Long.MAX_VALUE); |
| |
| return httpConnection; |
| } |
| |
| /** |
| * @see HttpConnectionManager#getConnection(HostConfiguration, long) |
| * @deprecated Use #getConnectionWithTimeout(HostConfiguration, long) |
| */ |
| public HttpConnection getConnection( |
| HostConfiguration hostConfiguration, long timeout) |
| { |
| return getConnectionWithTimeout(hostConfiguration, timeout); |
| } |
| |
| /** |
| * @see HttpConnectionManager#releaseConnection(org.apache.commons.httpclient.HttpConnection) |
| */ |
| public void releaseConnection(HttpConnection conn) |
| { |
| if (conn != getLocalHttpConnection()) |
| { |
| throw new IllegalStateException("Unexpected release of an unknown connection."); |
| } |
| |
| finishLastResponse(getLocalHttpConnection()); |
| |
| // track the time the connection was made idle |
| setIdleStartTime(System.currentTimeMillis()); |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| public void closeIdleConnections(long idleTimeout) |
| { |
| long maxIdleTime = System.currentTimeMillis() - idleTimeout; |
| if (getIdleStartTime() <= maxIdleTime) |
| { |
| getLocalHttpConnection().close(); |
| } |
| } |
| } |