/** Fetches a file from the URL given and returns an input stream to it. */
private static InputStream fetchFile(String url)
throws IOException, ClientProtocolException, FileNotFoundException {
HttpParams httpClientParams = new BasicHttpParams();
HttpProtocolParams.setUserAgent(httpClientParams, VersionInfoUtils.getUserAgent());
HttpClient httpclient = new DefaultHttpClient(httpClientParams);
HttpGet httpget = new HttpGet(url);
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
if (entity != null) {
return entity.getContent();
}
return null;
}
/**
* Client configuration options such as proxy settings, user agent string, max retry attempts, etc.
*/
@NotThreadSafe
public class ClientConfiguration {
/** The default timeout for a connected socket. */
public static final int DEFAULT_SOCKET_TIMEOUT = 50 * 1000;
/** The default max connection pool size. */
public static final int DEFAULT_MAX_CONNECTIONS = 50;
/** The default HTTP user agent header for AWS Java SDK clients. */
public static final String DEFAULT_USER_AGENT = VersionInfoUtils.getUserAgent();
/** The default maximum number of retries for error responses. */
public static final int DEFAULT_MAX_RETRIES = 3;
/**
* The default on whether to use the {@link IdleConnectionReaper} to manage stale connections
*
* @see IdleConnectionReaper
*/
public static final boolean DEFAULT_USE_REAPER = true;
/** The HTTP user agent header passed with all HTTP requests. */
private String userAgent = DEFAULT_USER_AGENT;
/**
* The maximum number of times that a retryable failed request (ex: a 5xx response from a service)
* will be retried.
*/
private int maxErrorRetry = DEFAULT_MAX_RETRIES;
/**
* The protocol to use when connecting to Amazon Web Services.
*
* <p>The default configuration is to use HTTPS for all requests for increased security.
*/
private Protocol protocol = Protocol.HTTPS;
/** Optionally specifies the proxy host to connect through. */
private String proxyHost = null;
/** Optionally specifies the port on the proxy host to connect through. */
private int proxyPort = -1;
/** Optionally specifies the user name to use when connecting through a proxy. */
private String proxyUsername = null;
/** Optionally specifies the password to use when connecting through a proxy. */
private String proxyPassword = null;
/** Optional Windows domain name for configuring NTLM proxy support. */
private String proxyDomain = null;
/** Optional Windows workstation name for configuring NTLM proxy support. */
private String proxyWorkstation = null;
/** The maximum number of open HTTP connections. */
private int maxConnections = DEFAULT_MAX_CONNECTIONS;
/**
* The amount of time to wait (in milliseconds) for data to be transfered over an established,
* open connection before the connection is timed out. A value of 0 means infinity, and is not
* recommended.
*/
private int socketTimeout = DEFAULT_SOCKET_TIMEOUT;
/**
* The amount of time to wait (in milliseconds) when initially establishing a connection before
* giving up and timing out. A value of 0 means infinity, and is not recommended.
*/
private int connectionTimeout = 50 * 1000;
/**
* Optional size hint (in bytes) for the low level TCP send buffer. This is an advanced option for
* advanced users who want to tune low level TCP parameters to try and squeeze out more
* performance.
*/
private int socketSendBufferSizeHint = 0;
/**
* Optional size hint (in bytes) for the low level TCP receive buffer. This is an advanced option
* for advanced users who want to tune low level TCP parameters to try and squeeze out more
* performance.
*/
private int socketReceiveBufferSizeHint = 0;
/**
* Optional whether to use the {@link IdleConnectionReaper} to manage stale connections. A reason
* for not running the {@link IdleConnectionReaper} can be if running in an environment where the
* modifyThread and modifyThreadGroup permissions are not allowed.
*/
private boolean useReaper = DEFAULT_USE_REAPER;
public ClientConfiguration() {}
public ClientConfiguration(ClientConfiguration other) {
this.connectionTimeout = other.connectionTimeout;
this.maxConnections = other.maxConnections;
this.maxErrorRetry = other.maxErrorRetry;
this.protocol = other.protocol;
this.proxyDomain = other.proxyDomain;
this.proxyHost = other.proxyHost;
this.proxyPassword = other.proxyPassword;
this.proxyPort = other.proxyPort;
this.proxyUsername = other.proxyUsername;
this.proxyWorkstation = other.proxyWorkstation;
this.socketTimeout = other.socketTimeout;
this.userAgent = other.userAgent;
this.useReaper = other.useReaper;
this.socketReceiveBufferSizeHint = other.socketReceiveBufferSizeHint;
this.socketSendBufferSizeHint = other.socketSendBufferSizeHint;
}
/**
* Returns the protocol (HTTP or HTTPS) to use when connecting to Amazon Web Services.
*
* <p>The default configuration is to use HTTPS for all requests for increased security.
*
* <p>Individual clients can also override this setting by explicitly including the protocol as
* part of the endpoint URL when calling {@link AmazonWebServiceClient#setEndpoint(String)}.
*
* @return The protocol to use when connecting to Amazon Web Services.
*/
public Protocol getProtocol() {
return protocol;
}
/**
* Sets the protocol (i.e. HTTP or HTTPS) to use when connecting to Amazon Web Services.
*
* <p>The default configuration is to use HTTPS for all requests for increased security.
*
* <p>Individual clients can also override this setting by explicitly including the protocol as
* part of the endpoint URL when calling {@link AmazonWebServiceClient#setEndpoint(String)}.
*
* @param protocol The protocol to use when connecting to Amazon Web Services.
*/
public void setProtocol(Protocol protocol) {
this.protocol = protocol;
}
/**
* Sets the protocol (i.e. HTTP or HTTPS) to use when connecting to Amazon Web Services, and
* returns the updated ClientConfiguration object so that additional calls may be chained
* together.
*
* <p>The default configuration is to use HTTPS for all requests for increased security.
*
* <p>Individual clients can also override this setting by explicitly including the protocol as
* part of the endpoint URL when calling {@link AmazonWebServiceClient#setEndpoint(String)}.
*
* @param protocol The protocol to use when connecting to Amazon Web Services.
* @return The updated ClientConfiguration object with the new max HTTP connections setting.
*/
public ClientConfiguration withProtocol(Protocol protocol) {
setProtocol(protocol);
return this;
}
/**
* Returns the maximum number of allowed open HTTP connections.
*
* @return The maximum number of allowed open HTTP connections.
*/
public int getMaxConnections() {
return maxConnections;
}
/**
* Sets the maximum number of allowed open HTTP connections.
*
* @param maxConnections The maximum number of allowed open HTTP connections.
*/
public void setMaxConnections(int maxConnections) {
this.maxConnections = maxConnections;
}
/**
* Sets the maximum number of allowed open HTTP connections and returns the updated
* ClientConfiguration object.
*
* @param maxConnections The maximum number of allowed open HTTP connections.
* @return The updated ClientConfiguration object with the new max HTTP connections setting.
*/
public ClientConfiguration withMaxConnections(int maxConnections) {
setMaxConnections(maxConnections);
return this;
}
/**
* Returns the HTTP user agent header to send with all requests.
*
* @return The user agent string to use when sending requests.
*/
public String getUserAgent() {
return userAgent;
}
/**
* Sets the HTTP user agent header to send with all requests.
*
* @param userAgent The user agent string to use when sending requests.
*/
public void setUserAgent(String userAgent) {
this.userAgent = userAgent;
}
/**
* Sets the HTTP user agent header used in requests and returns the updated ClientConfiguration
* object.
*
* @param userAgent The user agent string to use when sending requests.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withUserAgent(String userAgent) {
setUserAgent(userAgent);
return this;
}
/**
* Returns the optional proxy host the client will connect through.
*
* @return The proxy host the client will connect through.
*/
public String getProxyHost() {
return proxyHost;
}
/**
* Sets the optional proxy host the client will connect through.
*
* @param proxyHost The proxy host the client will connect through.
*/
public void setProxyHost(String proxyHost) {
this.proxyHost = proxyHost;
}
/**
* Sets the optional proxy host the client will connect through and returns the updated
* ClientConfiguration object.
*
* @param proxyHost The proxy host the client will connect through.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withProxyHost(String proxyHost) {
setProxyHost(proxyHost);
return this;
}
/**
* Returns the optional proxy port the client will connect through.
*
* @return The proxy port the client will connect through.
*/
public int getProxyPort() {
return proxyPort;
}
/**
* Sets the optional proxy port the client will connect through.
*
* @param proxyPort The proxy port the client will connect through.
*/
public void setProxyPort(int proxyPort) {
this.proxyPort = proxyPort;
}
/**
* Sets the optional proxy port the client will connect through and returns the updated
* ClientConfiguration object.
*
* @param proxyPort The proxy port the client will connect through.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withProxyPort(int proxyPort) {
setProxyPort(proxyPort);
return this;
}
/**
* Returns the optional proxy user name to use if connecting through a proxy.
*
* @return The optional proxy user name the configured client will use if connecting through a
* proxy.
*/
public String getProxyUsername() {
return proxyUsername;
}
/**
* Sets the optional proxy user name to use if connecting through a proxy.
*
* @param proxyUsername The proxy user name to use if connecting through a proxy.
*/
public void setProxyUsername(String proxyUsername) {
this.proxyUsername = proxyUsername;
}
/**
* Sets the optional proxy user name and returns the updated ClientConfiguration object.
*
* @param proxyUsername The proxy user name to use if connecting through a proxy.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withProxyUsername(String proxyUsername) {
setProxyUsername(proxyUsername);
return this;
}
/**
* Returns the optional proxy password to use when connecting through a proxy.
*
* @return The password to use when connecting through a proxy.
*/
public String getProxyPassword() {
return proxyPassword;
}
/**
* Sets the optional proxy password to use when connecting through a proxy.
*
* @param proxyPassword The password to use when connecting through a proxy.
*/
public void setProxyPassword(String proxyPassword) {
this.proxyPassword = proxyPassword;
}
/**
* Sets the optional proxy password to use when connecting through a proxy, and returns the
* updated ClientConfiguration object.
*
* @param proxyPassword The password to use when connecting through a proxy.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withProxyPassword(String proxyPassword) {
setProxyPassword(proxyPassword);
return this;
}
/**
* Returns the optional Windows domain name for configuring an NTLM proxy. If you aren't using a
* Windows NTLM proxy, you do not need to set this field.
*
* @return The optional Windows domain name for configuring an NTLM proxy.
*/
public String getProxyDomain() {
return proxyDomain;
}
/**
* Sets the optional Windows domain name for configuration an NTLM proxy. If you aren't using a
* Windows NTLM proxy, you do not need to set this field.
*
* @param proxyDomain The optional Windows domain name for configuring an NTLM proxy.
*/
public void setProxyDomain(String proxyDomain) {
this.proxyDomain = proxyDomain;
}
/**
* Sets the optional Windows domain name for configuration an NTLM proxy and returns a reference
* to this updated ClientConfiguration object so that additional method calls can be chained
* together. If you aren't using a Windows NTLM proxy, you do not need to set this field.
*
* @param proxyDomain The optional Windows domain name for configuring an NTLM proxy.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withProxyDomain(String proxyDomain) {
setProxyDomain(proxyDomain);
return this;
}
/**
* Returns the optional Windows workstation name for configuring NTLM proxy support. If you aren't
* using a Windows NTLM proxy, you do not need to set this field.
*
* @return The optional Windows workstation name for configuring NTLM proxy support.
*/
public String getProxyWorkstation() {
return proxyWorkstation;
}
/**
* Sets the optional Windows workstation name for configuring NTLM proxy support. If you aren't
* using a Windows NTLM proxy, you do not need to set this field.
*
* @param proxyWorkstation The optional Windows workstation name for configuring NTLM proxy
* support.
*/
public void setProxyWorkstation(String proxyWorkstation) {
this.proxyWorkstation = proxyWorkstation;
}
/**
* Sets the optional Windows workstation name for configuring NTLM proxy support, and returns the
* updated ClientConfiguration object so that additional method calls can be chained together. If
* you aren't using a Windows NTLM proxy, you do not need to set this field.
*
* @param proxyWorkstation The optional Windows workstation name for configuring NTLM proxy
* support.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withProxyWorkstation(String proxyWorkstation) {
setProxyWorkstation(proxyWorkstation);
return this;
}
/**
* Returns the maximum number of retry attempts for failed retryable requests (ex: 5xx error
* responses from a service).
*
* @return The maximum number of retry attempts for failed retryable requests.
*/
public int getMaxErrorRetry() {
return maxErrorRetry;
}
/**
* Sets the maximum number of retry attempts for failed retryable requests (ex: 5xx error
* responses from services).
*
* @param maxErrorRetry The maximum number of retry attempts for failed retryable requests.
*/
public void setMaxErrorRetry(int maxErrorRetry) {
this.maxErrorRetry = maxErrorRetry;
}
/**
* Sets the maximum number of retry attempts for failed retryable requests (ex: 5xx error
* responses from services), and returns the updated ClientConfiguration object.
*
* @param maxErrorRetry The maximum number of retry attempts for failed retryable requests.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withMaxErrorRetry(int maxErrorRetry) {
setMaxErrorRetry(maxErrorRetry);
return this;
}
/**
* Returns the amount of time to wait (in milliseconds) for data to be transfered over an
* established, open connection before the connection times out and is closed. A value of 0 means
* infinity, and isn't recommended.
*
* @return The amount of time to wait (in milliseconds) for data to be transfered over an
* established, open connection before the connection times out and is closed.
*/
public int getSocketTimeout() {
return socketTimeout;
}
/**
* Sets the amount of time to wait (in milliseconds) for data to be transfered over an
* established, open connection before the connection times out and is closed. A value of 0 means
* infinity, and isn't recommended.
*
* @param socketTimeout The amount of time to wait (in milliseconds) for data to be transfered
* over an established, open connection before the connection is times out and is closed.
*/
public void setSocketTimeout(int socketTimeout) {
this.socketTimeout = socketTimeout;
}
/**
* Sets the amount of time to wait (in milliseconds) for data to be transfered over an
* established, open connection before the connection times out and is closed, and returns the
* updated ClientConfiguration object so that additional method calls may be chained together.
*
* @param socketTimeout The amount of time to wait (in milliseconds) for data to be transfered
* over an established, open connection before the connection is times out and is closed.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withSocketTimeout(int socketTimeout) {
setSocketTimeout(socketTimeout);
return this;
}
/**
* Returns the amount of time to wait (in milliseconds) when initially establishing a connection
* before giving up and timing out. A value of 0 means infinity, and is not recommended.
*
* @return The amount of time to wait (in milliseconds) when initially establishing a connection
* before giving up and timing out.
*/
public int getConnectionTimeout() {
return connectionTimeout;
}
/**
* Sets the amount of time to wait (in milliseconds) when initially establishing a connection
* before giving up and timing out. A value of 0 means infinity, and is not recommended.
*
* @param connectionTimeout The amount of time to wait (in milliseconds) when initially
* establishing a connection before giving up and timing out.
*/
public void setConnectionTimeout(int connectionTimeout) {
this.connectionTimeout = connectionTimeout;
}
/**
* Sets the amount of time to wait (in milliseconds) when initially establishing a connection
* before giving up and timing out, and returns the updated ClientConfiguration object so that
* additional method calls may be chained together.
*
* @param connectionTimeout the amount of time to wait (in milliseconds) when initially
* establishing a connection before giving up and timing out.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withConnectionTimeout(int connectionTimeout) {
setConnectionTimeout(connectionTimeout);
return this;
}
/**
* Checks if the {@link IdleConnectionReaper} is to be started
*
* @return if the {@link IdleConnectionReaper} is to be started
*/
public boolean useReaper() {
return useReaper;
}
/**
* Sets whether the {@link IdleConnectionReaper} is to be started as a daemon thread
*
* @param use whether the {@link IdleConnectionReaper} is to be started as a daemon thread
* @see IdleConnectionReaper
*/
public void setUseReaper(boolean use) {
this.useReaper = use;
}
/**
* Sets whether the {@link IdleConnectionReaper} is to be started as a daemon thread
*
* @param use the {@link IdleConnectionReaper} is to be started as a daemon thread
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withReaper(boolean use) {
setUseReaper(use);
return this;
}
/**
* Returns the optional size hints (in bytes) for the low level TCP send and receive buffers. This
* is an advanced option for advanced users who want to tune low level TCP parameters to try and
* squeeze out more performance.
*
* <p>The optimal TCP buffer sizes for a particular application are highly dependent on network
* configuration and operating system configuration and capabilities. For example, most modern
* operating systems provide auto-tuning functionality for TCP buffer sizes, which can have a big
* impact on performance for TCP connections that are held open long enough for the auto-tuning to
* optimize buffer sizes.
*
* <p>Large buffer sizes (ex: 2MB) will allow the operating system to buffer more data in memory
* without requiring the remote server to acknowledge receipt of that information, so can be
* particularly useful when the network has high latency.
*
* <p>This is only a <b>hint</b>, and the operating system may choose not to honor it. When using
* this option, users should <b>always</b> check the operating system's configured limits and
* defaults. Most OS's have a maximum TCP buffer size limit configured, and won't let you go
* beyond that limit unless you explicitly raise the max TCP buffer size limit.
*
* <p>There are many resources available online to help with configuring TCP buffer sizes and
* operating system specific TCP settings, including:
*
* <ul>
* <li>http://onlamp.com/pub/a/onlamp/2005/11/17/tcp_tuning.html
* <li>http://fasterdata.es.net/TCP-tuning/
* </ul>
*
* @return A two element array containing first the TCP send buffer size hint and then the TCP
* receive buffer size hint.
*/
public int[] getSocketBufferSizeHints() {
return new int[] {socketSendBufferSizeHint, socketReceiveBufferSizeHint};
}
/**
* Sets the optional size hints (in bytes) for the low level TCP send and receive buffers. This is
* an advanced option for advanced users who want to tune low level TCP parameters to try and
* squeeze out more performance.
*
* <p>The optimal TCP buffer sizes for a particular application are highly dependent on network
* configuration and operating system configuration and capabilities. For example, most modern
* operating systems provide auto-tuning functionality for TCP buffer sizes, which can have a big
* impact on performance for TCP connections that are held open long enough for the auto-tuning to
* optimize buffer sizes.
*
* <p>Large buffer sizes (ex: 2MB) will allow the operating system to buffer more data in memory
* without requiring the remote server to acknowledge receipt of that information, so can be
* particularly useful when the network has high latency.
*
* <p>This is only a <b>hint</b>, and the operating system may choose not to honor it. When using
* this option, users should <b>always</b> check the operating system's configured limits and
* defaults. Most OS's have a maximum TCP buffer size limit configured, and won't let you go
* beyond that limit unless you explicitly raise the max TCP buffer size limit.
*
* <p>There are many resources available online to help with configuring TCP buffer sizes and
* operating system specific TCP settings, including:
*
* <ul>
* <li>http://onlamp.com/pub/a/onlamp/2005/11/17/tcp_tuning.html
* <li>http://fasterdata.es.net/TCP-tuning/
* </ul>
*
* @param socketSendBufferSizeHint The size hint (in bytes) for the low level TCP send buffer.
* @param socketReceiveBufferSizeHint The size hint (in bytes) for the low level TCP receive
* buffer.
*/
public void setSocketBufferSizeHints(
int socketSendBufferSizeHint, int socketReceiveBufferSizeHint) {
this.socketSendBufferSizeHint = socketSendBufferSizeHint;
this.socketReceiveBufferSizeHint = socketReceiveBufferSizeHint;
}
/**
* Sets the optional size hints (in bytes) for the low level TCP send and receive buffers, and
* returns the updated ClientConfiguration object so that additional method calls may be chained
* together.
*
* <p>This is an advanced option for advanced users who want to tune low level TCP parameters to
* try and squeeze out more performance.
*
* <p>The optimal TCP buffer sizes for a particular application are highly dependent on network
* configuration and operating system configuration and capabilities. For example, most modern
* operating systems provide auto-tuning functionality for TCP buffer sizes, which can have a big
* impact on performance for TCP connections that are held open long enough for the auto-tuning to
* optimize buffer sizes.
*
* <p>Large buffer sizes (ex: 2MB) will allow the operating system to buffer more data in memory
* without requiring the remote server to acknowledge receipt of that information, so can be
* particularly useful when the network has high latency.
*
* <p>This is only a <b>hint</b>, and the operating system may choose not to honor it. When using
* this option, users should <b>always</b> check the operating system's configured limits and
* defaults. Most OS's have a maximum TCP buffer size limit configured, and won't let you go
* beyond that limit unless you explicitly raise the max TCP buffer size limit.
*
* <p>There are many resources available online to help with configuring TCP buffer sizes and
* operating system specific TCP settings, including:
*
* <ul>
* <li>http://onlamp.com/pub/a/onlamp/2005/11/17/tcp_tuning.html
* <li>http://fasterdata.es.net/TCP-tuning/
* </ul>
*
* @param socketSendBufferSizeHint The size hint (in bytes) for the low level TCP send buffer.
* @param socketReceiveBufferSizeHint The size hint (in bytes) for the low level TCP receive
* buffer.
* @return The updated ClientConfiguration object.
*/
public ClientConfiguration withSocketBufferSizeHints(
int socketSendBufferSizeHint, int socketReceiveBufferSizeHint) {
setSocketBufferSizeHints(socketSendBufferSizeHint, socketReceiveBufferSizeHint);
return this;
}
}