*/
package jalview.ext.ensembl;
+import jalview.bin.Jalview;
import jalview.io.DataSourceType;
import jalview.io.FileParse;
import jalview.util.StringUtils;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
+import java.net.ProtocolException;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
private static final int CONNECT_TIMEOUT_MS = 10 * 1000; // 10 seconds
+ private static final int MAX_RETRIES = 3;
+
+ private static final int HTTP_OK = 200;
+
+ private static final int HTTP_OVERLOAD = 429;
+
/*
* update these constants when Jalview has been checked / updated for
* changes to Ensembl REST API (ref JAL-2105)
* @see https://github.com/Ensembl/ensembl-rest/wiki/Change-log
* @see http://rest.ensembl.org/info/rest?content-type=application/json
*/
- private static final String LATEST_ENSEMBLGENOMES_REST_VERSION = "5.0";
+ private static final String LATEST_ENSEMBLGENOMES_REST_VERSION = "7.0";
- private static final String LATEST_ENSEMBL_REST_VERSION = "5.0";
+ private static final String LATEST_ENSEMBL_REST_VERSION = "7.0";
private static final String REST_CHANGE_LOG = "https://github.com/Ensembl/ensembl-rest/wiki/Change-log";
- private static Map<String, EnsemblInfo> domainData;
-
- // @see https://github.com/Ensembl/ensembl-rest/wiki/Output-formats
- private static final String PING_URL = "http://rest.ensembl.org/info/ping.json";
+ private static Map<String, EnsemblData> domainData;
private final static long AVAILABILITY_RETEST_INTERVAL = 10000L; // 10 seconds
private final static long VERSION_RETEST_INTERVAL = 1000L * 3600; // 1 hr
+ protected static final String CONTENT_TYPE_JSON = "?content-type=application/json";
+
static
{
- domainData = new HashMap<String, EnsemblInfo>();
- domainData.put(ENSEMBL_REST,
- new EnsemblInfo(ENSEMBL_REST, LATEST_ENSEMBL_REST_VERSION));
- domainData.put(ENSEMBL_GENOMES_REST, new EnsemblInfo(
- ENSEMBL_GENOMES_REST, LATEST_ENSEMBLGENOMES_REST_VERSION));
+ domainData = new HashMap<>();
+ domainData.put(DEFAULT_ENSEMBL_BASEURL,
+ new EnsemblData(DEFAULT_ENSEMBL_BASEURL, LATEST_ENSEMBL_REST_VERSION));
+ domainData.put(DEFAULT_ENSEMBL_GENOMES_BASEURL, new EnsemblData(
+ DEFAULT_ENSEMBL_GENOMES_BASEURL, LATEST_ENSEMBLGENOMES_REST_VERSION));
}
protected volatile boolean inProgress = false;
*/
public EnsemblRestClient()
{
- this(ENSEMBL_REST);
+ super();
+
+ /*
+ * initialise domain info lazily
+ */
+ if (!domainData.containsKey(ensemblDomain))
+ {
+ domainData.put(ensemblDomain,
+ new EnsemblData(ensemblDomain, LATEST_ENSEMBL_REST_VERSION));
+ }
+ if (!domainData.containsKey(ensemblGenomesDomain))
+ {
+ domainData.put(ensemblGenomesDomain, new EnsemblData(
+ ensemblGenomesDomain, LATEST_ENSEMBLGENOMES_REST_VERSION));
+ }
}
/**
protected abstract boolean useGetRequest();
/**
- * Return the desired value for the Content-Type request header
- *
- * @param multipleIds
+ * Returns the desired value for the Content-Type request header. Default is
+ * application/json, override if required to vary this.
*
* @return
* @see https://github.com/Ensembl/ensembl-rest/wiki/HTTP-Headers
*/
- protected abstract String getRequestMimeType(boolean multipleIds);
+ protected String getRequestMimeType()
+ {
+ return "application/json";
+ }
/**
- * Return the desired value for the Accept request header
+ * Return the desired value for the Accept request header. Default is
+ * application/json, override if required to vary this.
*
* @return
* @see https://github.com/Ensembl/ensembl-rest/wiki/HTTP-Headers
*/
- protected abstract String getResponseMimeType();
+ protected String getResponseMimeType()
+ {
+ return "application/json";
+ }
/**
* Checks Ensembl's REST 'ping' endpoint, and returns true if response
* @see http://rest.ensembl.org/documentation/info/ping
* @return
*/
- private boolean checkEnsembl()
+ boolean checkEnsembl()
{
BufferedReader br = null;
+ String pingUrl = getDomain() + "/info/ping" + CONTENT_TYPE_JSON;
try
{
// note this format works for both ensembl and ensemblgenomes
// info/ping.json works for ensembl only (March 2016)
- URL ping = new URL(
- getDomain() + "/info/ping?content-type=application/json");
+ URL ping = new URL(pingUrl);
/*
* expect {"ping":1} if ok
} catch (Throwable t)
{
System.err.println(
- "Error connecting to " + PING_URL + ": " + t.getMessage());
+ "Error connecting to " + pingUrl + ": " + t.getMessage());
} finally
{
if (br != null)
}
/**
- * returns a reader to a Fasta response from the Ensembl sequence endpoint
+ * Returns a reader to a (Json) response from the Ensembl sequence endpoint.
+ * If the request failed the return value may be null.
*
* @param ids
* @return
* @throws IOException
*/
- protected FileParse getSequenceReader(List<String> ids) throws IOException
+ protected BufferedReader getSequenceReader(List<String> ids)
+ throws IOException
{
URL url = getUrl(ids);
BufferedReader reader = getHttpResponse(url, ids);
- if (reader == null)
- {
- // request failed
- return null;
- }
- FileParse fp = new FileParse(reader, url.toString(),
- DataSourceType.URL);
- return fp;
+ return reader;
}
/**
}
/**
- * Writes the HTTP request and gets the response as a reader.
+ * Sends the HTTP request and gets the response as a reader. Returns null if
+ * the HTTP response code was not 200.
*
* @param url
* @param ids
* in milliseconds
* @return
* @throws IOException
- * if response code was not 200, or other I/O error
*/
protected BufferedReader getHttpResponse(URL url, List<String> ids,
int readTimeout) throws IOException
{
- // long now = System.currentTimeMillis();
- HttpURLConnection connection = (HttpURLConnection) url.openConnection();
-
- /*
- * POST method allows multiple queries in one request; it is supported for
- * sequence queries, but not for overlap
- */
- boolean multipleIds = ids != null && ids.size() > 1;
- connection.setRequestMethod(
- multipleIds ? HttpMethod.POST : HttpMethod.GET);
- connection.setRequestProperty("Content-Type",
- getRequestMimeType(multipleIds));
- connection.setRequestProperty("Accept", getResponseMimeType());
+ int retriesLeft = MAX_RETRIES;
+ HttpURLConnection connection = null;
+ int responseCode = 0;
- connection.setUseCaches(false);
- connection.setDoInput(true);
- connection.setDoOutput(multipleIds);
-
- connection.setConnectTimeout(CONNECT_TIMEOUT_MS);
- connection.setReadTimeout(readTimeout);
-
- if (multipleIds)
+ while (retriesLeft > 0)
{
- writePostBody(connection, ids);
+ connection = tryConnection(url, ids, readTimeout);
+ responseCode = connection.getResponseCode();
+ if (responseCode == HTTP_OVERLOAD) // 429
+ {
+ retriesLeft--;
+ checkRetryAfter(connection);
+ }
+ else
+ {
+ retriesLeft = 0;
+ }
}
-
- int responseCode = connection.getResponseCode();
-
- if (responseCode != 200)
+ if (responseCode != HTTP_OK) // 200
{
/*
* note: a GET request for an invalid id returns an error code e.g. 415
System.err.println("Response code " + responseCode + " for " + url);
return null;
}
- // get content
+
InputStream response = connection.getInputStream();
// System.out.println(getClass().getName() + " took "
// + (System.currentTimeMillis() - now) + "ms to fetch");
- checkRateLimits(connection);
-
BufferedReader reader = null;
reader = new BufferedReader(new InputStreamReader(response, "UTF-8"));
return reader;
}
/**
- * Inspect response headers for any sign of server overload and respect any
- * 'retry-after' directive
+ * @param url
+ * @param ids
+ * @param readTimeout
+ * @return
+ * @throws IOException
+ * @throws ProtocolException
+ */
+ protected HttpURLConnection tryConnection(URL url, List<String> ids,
+ int readTimeout) throws IOException, ProtocolException
+ {
+ // System.out.println(System.currentTimeMillis() + " " + url);
+ HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+
+ /*
+ * POST method allows multiple queries in one request; it is supported for
+ * sequence queries, but not for overlap
+ */
+ boolean multipleIds = ids != null && ids.size() > 1;
+ connection.setRequestMethod(
+ multipleIds ? HttpMethod.POST : HttpMethod.GET);
+ connection.setRequestProperty("Content-Type", getRequestMimeType());
+ connection.setRequestProperty("Accept", getResponseMimeType());
+
+ connection.setDoInput(true);
+ connection.setDoOutput(multipleIds);
+
+ if (!Jalview.isJS())
+ {
+ connection.setUseCaches(false);
+ connection.setConnectTimeout(CONNECT_TIMEOUT_MS);
+ connection.setReadTimeout(readTimeout);
+ }
+
+ if (multipleIds)
+ {
+ writePostBody(connection, ids);
+ }
+ return connection;
+ }
+
+ /**
+ * Inspects response headers for a 'retry-after' directive, and waits for the
+ * directed period (if less than 10 seconds)
*
* @see https://github.com/Ensembl/ensembl-rest/wiki/Rate-Limits
* @param connection
*/
- void checkRateLimits(HttpURLConnection connection)
+ void checkRetryAfter(HttpURLConnection connection)
{
- // number of requests allowed per time interval:
- // String limit = connection.getHeaderField("X-RateLimit-Limit");
- // length of quota time interval in seconds:
- // String period = connection.getHeaderField("X-RateLimit-Period");
- // seconds remaining until usage quota is reset:
- // String reset = connection.getHeaderField("X-RateLimit-Reset");
- // number of requests remaining from quota for current period:
- // String remaining = connection.getHeaderField("X-RateLimit-Remaining");
- // number of seconds to wait before retrying (if remaining == 0)
String retryDelay = connection.getHeaderField("Retry-After");
// to test:
// retryDelay = "5";
- EnsemblInfo info = domainData.get(getDomain());
if (retryDelay != null)
{
- System.err.println("Ensembl REST service rate limit exceeded, wait "
- + retryDelay + " seconds before retrying");
try
{
- info.retryAfter = System.currentTimeMillis()
- + (1000 * Integer.valueOf(retryDelay));
- } catch (NumberFormatException e)
+ int retrySecs = Integer.valueOf(retryDelay);
+ if (retrySecs > 0 && retrySecs < 10)
+ {
+ System.err
+ .println("Ensembl REST service rate limit exceeded, waiting "
+ + retryDelay + " seconds before retrying");
+ Thread.sleep(1000 * retrySecs);
+ }
+ } catch (NumberFormatException | InterruptedException e)
{
- System.err
- .println("Unexpected value for Retry-After: " + retryDelay);
+ System.err.println("Error handling Retry-After: " + e.getMessage());
}
}
- else
- {
- info.retryAfter = 0;
- // debug:
- // System.out.println(String.format(
- // "%s Ensembl requests remaining of %s (reset in %ss)",
- // remaining, limit, reset));
- }
}
/**
*/
protected boolean isEnsemblAvailable()
{
- EnsemblInfo info = domainData.get(getDomain());
+ EnsemblData info = domainData.get(getDomain());
long now = System.currentTimeMillis();
/*
- * check if we are waiting for 'Retry-After' to expire
- */
- if (info.retryAfter > now)
- {
- System.err.println("Still " + (1 + (info.retryAfter - now) / 1000)
- + " secs to wait before retrying Ensembl");
- return false;
- }
- else
- {
- info.retryAfter = 0;
- }
-
- /*
* recheck if Ensembl is up if it was down, or the recheck period has elapsed
*/
boolean retestAvailability = (now
*/
private void checkEnsemblRestVersion()
{
- EnsemblInfo info = domainData.get(getDomain());
+ EnsemblData info = domainData.get(getDomain());
JSONParser jp = new JSONParser();
URL url = null;
try
{
- url = new URL(
- getDomain() + "/info/rest?content-type=application/json");
+ url = new URL(getDomain() + "/info/rest" + CONTENT_TYPE_JSON);
BufferedReader br = getHttpResponse(url, null);
if (br == null)
{
{
JSONParser jp = new JSONParser();
URL url = null;
+ BufferedReader br = null;
+
try
{
- url = new URL(
- getDomain() + "/info/data?content-type=application/json");
- BufferedReader br = getHttpResponse(url, null);
+ url = new URL(getDomain() + "/info/data" + CONTENT_TYPE_JSON);
+ br = getHttpResponse(url, null);
if (br != null)
{
JSONObject val = (JSONObject) jp.parse(br);
{
System.err.println(
"Error checking Ensembl data version: " + t.getMessage());
+ } finally
+ {
+ if (br != null)
+ {
+ try
+ {
+ br.close();
+ } catch (IOException e)
+ {
+ // ignore
+ }
+ }
}
}
git://source.jalview.org / jalview.git / blobdiff