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Dropwizard Codahale metrics plugin for signalfx
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/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* proxyChain;
/** Whether the the route is tunnelled through the proxy. */
private final TunnelType tunnelled;
/** Whether the route is layered. */
private final LayerType layered;
/** Whether the route is (supposed to be) secure. */
private final boolean secure;
private HttpRoute(final HttpHost target, final InetAddress local, final List proxies,
final boolean secure, final TunnelType tunnelled, final LayerType layered) {
Args.notNull(target, "Target host");
this.targetHost = normalize(target);
this.localAddress = local;
if (proxies != null && !proxies.isEmpty()) {
this.proxyChain = new ArrayList(proxies);
} else {
this.proxyChain = null;
}
if (tunnelled == TunnelType.TUNNELLED) {
Args.check(this.proxyChain != null, "Proxy required if tunnelled");
}
this.secure = secure;
this.tunnelled = tunnelled != null ? tunnelled : TunnelType.PLAIN;
this.layered = layered != null ? layered : LayerType.PLAIN;
}
//TODO: to be removed in 5.0
private static int getDefaultPort(final String schemeName) {
if ("http".equalsIgnoreCase(schemeName)) {
return 80;
} else if ("https".equalsIgnoreCase(schemeName)) {
return 443;
} else {
return -1;
}
}
//TODO: to be removed in 5.0
private static HttpHost normalize(final HttpHost target) {
if (target.getPort() >= 0 ) {
return target;
}
final InetAddress address = target.getAddress();
final String schemeName = target.getSchemeName();
return address != null
? new HttpHost(address, getDefaultPort(schemeName), schemeName)
: new HttpHost(target.getHostName(), getDefaultPort(schemeName),
schemeName);
}
/**
* Creates a new route with all attributes specified explicitly.
*
* @param target the host to which to route
* @param local the local address to route from, or
* {@code null} for the default
* @param proxies the proxy chain to use, or
* {@code null} for a direct route
* @param secure {@code true} if the route is (to be) secure,
* {@code false} otherwise
* @param tunnelled the tunnel type of this route
* @param layered the layering type of this route
*/
public HttpRoute(final HttpHost target, final InetAddress local, final HttpHost[] proxies,
final boolean secure, final TunnelType tunnelled, final LayerType layered) {
this(target, local, proxies != null ? Arrays.asList(proxies) : null,
secure, tunnelled, layered);
}
/**
* Creates a new route with at most one proxy.
*
* @param target the host to which to route
* @param local the local address to route from, or
* {@code null} for the default
* @param proxy the proxy to use, or
* {@code null} for a direct route
* @param secure {@code true} if the route is (to be) secure,
* {@code false} otherwise
* @param tunnelled {@code true} if the route is (to be) tunnelled
* via the proxy,
* {@code false} otherwise
* @param layered {@code true} if the route includes a
* layered protocol,
* {@code false} otherwise
*/
public HttpRoute(final HttpHost target, final InetAddress local, final HttpHost proxy,
final boolean secure, final TunnelType tunnelled, final LayerType layered) {
this(target, local, proxy != null ? Collections.singletonList(proxy) : null,
secure, tunnelled, layered);
}
/**
* Creates a new direct route.
* That is a route without a proxy.
*
* @param target the host to which to route
* @param local the local address to route from, or
* {@code null} for the default
* @param secure {@code true} if the route is (to be) secure,
* {@code false} otherwise
*/
public HttpRoute(final HttpHost target, final InetAddress local, final boolean secure) {
this(target, local, Collections.emptyList(), secure,
TunnelType.PLAIN, LayerType.PLAIN);
}
/**
* Creates a new direct insecure route.
*
* @param target the host to which to route
*/
public HttpRoute(final HttpHost target) {
this(target, null, Collections.emptyList(), false,
TunnelType.PLAIN, LayerType.PLAIN);
}
/**
* Creates a new route through a proxy.
* When using this constructor, the {@code proxy} MUST be given.
* For convenience, it is assumed that a secure connection will be
* layered over a tunnel through the proxy.
*
* @param target the host to which to route
* @param local the local address to route from, or
* {@code null} for the default
* @param proxy the proxy to use
* @param secure {@code true} if the route is (to be) secure,
* {@code false} otherwise
*/
public HttpRoute(final HttpHost target, final InetAddress local, final HttpHost proxy,
final boolean secure) {
this(target, local, Collections.singletonList(Args.notNull(proxy, "Proxy host")), secure,
secure ? TunnelType.TUNNELLED : TunnelType.PLAIN,
secure ? LayerType.LAYERED : LayerType.PLAIN);
}
/**
* Creates a new plain route through a proxy.
*
* @param target the host to which to route
* @param proxy the proxy to use
*
* @since 4.3
*/
public HttpRoute(final HttpHost target, final HttpHost proxy) {
this(target, null, proxy, false);
}
@Override
public HttpHost getTargetHost() {
return this.targetHost;
}
@Override
public InetAddress getLocalAddress() {
return this.localAddress;
}
public InetSocketAddress getLocalSocketAddress() {
return this.localAddress != null ? new InetSocketAddress(this.localAddress, 0) : null;
}
@Override
public int getHopCount() {
return proxyChain != null ? proxyChain.size() + 1 : 1;
}
@Override
public HttpHost getHopTarget(final int hop) {
Args.notNegative(hop, "Hop index");
final int hopcount = getHopCount();
Args.check(hop < hopcount, "Hop index exceeds tracked route length");
return hop < hopcount - 1 ? this.proxyChain.get(hop) : this.targetHost;
}
@Override
public HttpHost getProxyHost() {
return proxyChain != null && !this.proxyChain.isEmpty() ? this.proxyChain.get(0) : null;
}
@Override
public TunnelType getTunnelType() {
return this.tunnelled;
}
@Override
public boolean isTunnelled() {
return (this.tunnelled == TunnelType.TUNNELLED);
}
@Override
public LayerType getLayerType() {
return this.layered;
}
@Override
public boolean isLayered() {
return (this.layered == LayerType.LAYERED);
}
@Override
public boolean isSecure() {
return this.secure;
}
/**
* Compares this route to another.
*
* @param obj the object to compare with
*
* @return {@code true} if the argument is the same route,
* {@code false}
*/
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof HttpRoute) {
final HttpRoute that = (HttpRoute) obj;
return
// Do the cheapest tests first
(this.secure == that.secure) &&
(this.tunnelled == that.tunnelled) &&
(this.layered == that.layered) &&
LangUtils.equals(this.targetHost, that.targetHost) &&
LangUtils.equals(this.localAddress, that.localAddress) &&
LangUtils.equals(this.proxyChain, that.proxyChain);
}
return false;
}
/**
* Generates a hash code for this route.
*
* @return the hash code
*/
@Override
public int hashCode() {
int hash = LangUtils.HASH_SEED;
hash = LangUtils.hashCode(hash, this.targetHost);
hash = LangUtils.hashCode(hash, this.localAddress);
if (this.proxyChain != null) {
for (final HttpHost element : this.proxyChain) {
hash = LangUtils.hashCode(hash, element);
}
}
hash = LangUtils.hashCode(hash, this.secure);
hash = LangUtils.hashCode(hash, this.tunnelled);
hash = LangUtils.hashCode(hash, this.layered);
return hash;
}
/**
* Obtains a description of this route.
*
* @return a human-readable representation of this route
*/
@Override
public String toString() {
final StringBuilder cab = new StringBuilder(50 + getHopCount()*30);
if (this.localAddress != null) {
cab.append(this.localAddress);
cab.append("->");
}
cab.append('{');
if (this.tunnelled == TunnelType.TUNNELLED) {
cab.append('t');
}
if (this.layered == LayerType.LAYERED) {
cab.append('l');
}
if (this.secure) {
cab.append('s');
}
cab.append("}->");
if (this.proxyChain != null) {
for (final HttpHost aProxyChain : this.proxyChain) {
cab.append(aProxyChain);
cab.append("->");
}
}
cab.append(this.targetHost);
return cab.toString();
}
// default implementation of clone() is sufficient
@Override
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
}
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